diff --git a/HISTORY.md b/HISTORY.md
index c270a86..2c240b8 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,6 +2,10 @@
 
 ---
 
+## 1.2.1
+
+`tag:improved` 修改 sticky.stick 的默认 marginTop 为 0, fix [#13](https://github.com/aralejs/sticky/issues/13)
+
 ## 1.2.0
 
 `tag:improved` 优化接口, 去除 event 依赖, 增加 callback 参数. 简化两个 position 判断.  [#11](https://github.com/aralejs/sticky/issues/11)
diff --git a/dist/sticky-debug.js b/dist/sticky-debug.js
index a6e1b81..0b28b6c 100644
--- a/dist/sticky-debug.js
+++ b/dist/sticky-debug.js
@@ -1,4 +1,4 @@
-define("arale/sticky/1.2.0/sticky-debug", [ "$-debug" ], function(require, exports, module) {
+define("arale/sticky/1.2.1/sticky-debug", [ "$-debug" ], function(require, exports, module) {
     var $ = require("$-debug"), doc = $(document), stickyPrefix = [ "-webkit-", "-ms-", "-o-", "-moz-", "" ], // 只需判断是否是 IE 和 IE6
     ua = (window.navigator.userAgent || "").toLowerCase(), isIE = ua.indexOf("msie") !== -1, isIE6 = ua.indexOf("msie 6") !== -1, guid = 0;
     var _isPositionStickySupported = checkPositionStickySupported(), _isPositionFixedSupported = checkPositionFixedSupported();
@@ -12,7 +12,6 @@ define("arale/sticky/1.2.0/sticky-debug", [ "$-debug" ], function(require, expor
         if (!elem.length || elem.data("bind-fixed")) return;
         // 记录元素原来的位置
         self._originTop = elem.offset().top;
-        self._originLeft = elem.offset().left;
         self.marginTop = $.isNumeric(self.options.marginTop) ? Math.min(self.options.marginTop, self._originTop) : self._originTop;
         self._originStyles = {
             position: null,
@@ -49,11 +48,12 @@ define("arale/sticky/1.2.0/sticky-debug", [ "$-debug" ], function(require, expor
         // 当距离小于等于预设的值时
         // 将元素设为 fix 状态
         if (!elem.data("_fixed") && distance <= marginTop) {
+            var offsetLeft = elem.offset().left;
             self._addPlaceholder();
             elem.css({
                 position: "fixed",
                 top: marginTop,
-                left: self._originLeft
+                left: offsetLeft
             });
             elem.data("_fixed", true);
             $.isFunction(self.options.callback) && self.options.callback.call(self, true);
@@ -116,7 +116,7 @@ define("arale/sticky/1.2.0/sticky-debug", [ "$-debug" ], function(require, expor
         this._stickyId = guid++;
     }
     Sticky.prototype.render = function() {
-        var self = this, elem = self.elem = $(self.options.element), tmp = "";
+        var self = this, elem = self.elem = $(self.options.element);
         // 一个元素只允许绑定一次
         if (!elem.length || elem.data("bind-fixed")) return;
         // 记录元素原来的位置
@@ -132,10 +132,6 @@ define("arale/sticky/1.2.0/sticky-debug", [ "$-debug" ], function(require, expor
                 self._originStyles[style] = elem.css(style);
             }
         }
-        for (var i = 0; i < stickyPrefix.length; i++) {
-            tmp += "position:" + stickyPrefix[i] + "sticky;";
-        }
-        elem[0].style.cssText += tmp + "top: " + self.marginTop + "px;";
         self._supportSticky();
         $(window).on("scroll." + self._stickyId, function() {
             if (!elem.is(":visible")) return;
@@ -145,9 +141,13 @@ define("arale/sticky/1.2.0/sticky-debug", [ "$-debug" ], function(require, expor
         return self;
     };
     Sticky.prototype._supportSticky = function() {
-        var self = this, elem = self.elem, originTop = self._originTop, marginTop = self.marginTop;
+        var self = this, elem = self.elem, originTop = self._originTop, marginTop = self.marginTop, tmp = "";
         var distance = originTop - doc.scrollTop();
         if (!elem.data("_fixed") && distance <= marginTop) {
+            for (var i = 0; i < stickyPrefix.length; i++) {
+                tmp += "position:" + stickyPrefix[i] + "sticky;";
+            }
+            elem[0].style.cssText += tmp + "top: " + self.marginTop + "px;";
             elem.data("_fixed", true);
             // 支持 position: sticky 的是不需要占位符的
             $.isFunction(self.options.callback) && self.options.callback.call(self, true);
@@ -172,7 +172,7 @@ define("arale/sticky/1.2.0/sticky-debug", [ "$-debug" ], function(require, expor
         var actual = stick.isPositionStickySupported ? Sticky : Fixed;
         return new actual({
             element: elem,
-            marginTop: marginTop,
+            marginTop: marginTop || 0,
             callback: callback
         }).render();
     }
diff --git a/dist/sticky.js b/dist/sticky.js
index 8bac6c2..c9419b2 100644
--- a/dist/sticky.js
+++ b/dist/sticky.js
@@ -1 +1 @@
-define("arale/sticky/1.2.0/sticky",["$"],function(a,b,c){function d(a){this.options=a,this._stickyId=p++}function e(a){this.options=a,this._stickyId=p++}function f(a,b,c){var g=f.isPositionStickySupported?e:d;return new g({element:a,marginTop:b,callback:c}).render()}function g(){return!o}function h(){if(n)return!1;var a=k[0].body;if(k[0].createElement&&a&&a.appendChild&&a.removeChild){var b,c=k[0].createElement("div"),d=function(a){return window.getComputedStyle?window.getComputedStyle(c).getPropertyValue(a):c.currentStyle.getAttribute(a)};a.appendChild(c);for(var e=0;e<l.length&&(c.style.cssText="position:"+l[e]+"sticky;visibility:hidden;",!(b=-1!==d("position").indexOf("sticky")));e++);return c.parentNode.removeChild(c),b}return!1}function i(a,b){if(null==a)return-1;var c=Array.prototype.indexOf;if(c&&a.indexOf===c)return a.indexOf(b);for(var d=0;d<a.length;d++)if(a[d]===b)return d;return-1}var j=a("$"),k=j(document),l=["-webkit-","-ms-","-o-","-moz-",""],m=(window.navigator.userAgent||"").toLowerCase(),n=-1!==m.indexOf("msie"),o=-1!==m.indexOf("msie 6"),p=0,q=h(),r=g();d.prototype.render=function(){var a=this,b=a.elem=j(a.options.element);if(b.length&&!b.data("bind-fixed")){a._originTop=b.offset().top,a._originLeft=b.offset().left,a.marginTop=j.isNumeric(a.options.marginTop)?Math.min(a.options.marginTop,a._originTop):a._originTop,a._originStyles={position:null,top:null,left:null};for(var c in a._originStyles)a._originStyles.hasOwnProperty(c)&&(a._originStyles[c]=b.css(c));var d=f.isPositionFixedSupported?j.proxy(a._supportFixed,a):j.proxy(a._supportAbsolute,a);return f.isPositionFixedSupported||j("<style type='text/css'> * html { background:url(null) no-repeat fixed; } </style>").appendTo("head"),d(),j(window).on("scroll."+a._stickyId,function(){b.is(":visible")&&d()}),b.data("bind-fixed",!0),a}},d.prototype._supportFixed=function(){var a=this,b=a.elem,c=a._originTop,d=a.marginTop,e=c-k.scrollTop();!b.data("_fixed")&&d>=e?(a._addPlaceholder(),b.css({position:"fixed",top:d,left:a._originLeft}),b.data("_fixed",!0),j.isFunction(a.options.callback)&&a.options.callback.call(a,!0)):b.data("_fixed")&&e>d&&a._restore()},d.prototype._supportAbsolute=function(){var a=this,b=a.elem,c=a._originTop,d=a.marginTop,e=c-k.scrollTop();d>=e?(a._addPlaceholder(),b.css({position:"absolute",top:d+k.scrollTop()}),b.data("_fixed",!0),j.isFunction(a.options.callback)&&a.options.callback.call(a,!0)):b.data("_fixed")&&e>d&&a._restore()},d.prototype._restore=function(a){var b=this,c=b.elem;b._removePlaceholder(),c.css(b._originStyles),c.data("_fixed",!1),!a&&j.isFunction(b.options.callback)&&b.options.callback.call(b,!1)},d.prototype._addPlaceholder=function(){var a=this,b=a.elem,c=!1,d=b.css("float"),e=b.css("position"),f=b.css("display");-1!==i(["static","relative"],e)&&(c=!0),"block"!==f&&(c=!1),c&&(a._placeholder=j('<div style="visibility: hidden;margin:0;padding:0;"></div>'),a._placeholder.width(b.outerWidth(!0)).height(b.outerHeight(!0)).css("float",d).insertAfter(b))},d.prototype._removePlaceholder=function(){var a=this;a._placeholder&&a._placeholder.remove()},d.prototype.destory=function(){var a=this;a._restore(1),a.elem.data("bind-fixed",!1),j(window).off("scroll."+a._stickyId)},e.prototype.render=function(){var a=this,b=a.elem=j(a.options.element),c="";if(b.length&&!b.data("bind-fixed")){a._originTop=b.offset().top,a.marginTop=j.isNumeric(a.options.marginTop)?Math.min(a.options.marginTop,a._originTop):a._originTop,a._originStyles={position:null,top:null};for(var d in a._originStyles)a._originStyles.hasOwnProperty(d)&&(a._originStyles[d]=b.css(d));for(var e=0;e<l.length;e++)c+="position:"+l[e]+"sticky;";return b[0].style.cssText+=c+"top: "+a.marginTop+"px;",a._supportSticky(),j(window).on("scroll."+a._stickyId,function(){b.is(":visible")&&a._supportSticky()}),b.data("bind-fixed",!0),a}},e.prototype._supportSticky=function(){var a=this,b=a.elem,c=a._originTop,d=a.marginTop,e=c-k.scrollTop();!b.data("_fixed")&&d>=e?(b.data("_fixed",!0),j.isFunction(a.options.callback)&&a.options.callback.call(a,!0)):b.data("_fixed")&&e>d&&a._restore()},e.prototype._restore=function(a){var b=this,c=b.elem;c.css(b._originStyles),c.data("_fixed",!1),!a&&j.isFunction(b.options.callback)&&b.options.callback.call(b,!1)},e.prototype.destory=function(){var a=this;a._restore(1),a.elem.data("bind-fixed",!1),j(window).off("scroll."+a._stickyId)},f.stick=f,f.fix=function(a){return new d({element:a}).render()},f.isPositionFixedSupported=r,f.isPositionStickySupported=q,c.exports=f});
+define("arale/sticky/1.2.1/sticky",["$"],function(a,b,c){function d(a){this.options=a,this._stickyId=p++}function e(a){this.options=a,this._stickyId=p++}function f(a,b,c){var g=f.isPositionStickySupported?e:d;return new g({element:a,marginTop:b||0,callback:c}).render()}function g(){return!o}function h(){if(n)return!1;var a=k[0].body;if(k[0].createElement&&a&&a.appendChild&&a.removeChild){var b,c=k[0].createElement("div"),d=function(a){return window.getComputedStyle?window.getComputedStyle(c).getPropertyValue(a):c.currentStyle.getAttribute(a)};a.appendChild(c);for(var e=0;e<l.length&&(c.style.cssText="position:"+l[e]+"sticky;visibility:hidden;",!(b=-1!==d("position").indexOf("sticky")));e++);return c.parentNode.removeChild(c),b}return!1}function i(a,b){if(null==a)return-1;var c=Array.prototype.indexOf;if(c&&a.indexOf===c)return a.indexOf(b);for(var d=0;d<a.length;d++)if(a[d]===b)return d;return-1}var j=a("$"),k=j(document),l=["-webkit-","-ms-","-o-","-moz-",""],m=(window.navigator.userAgent||"").toLowerCase(),n=-1!==m.indexOf("msie"),o=-1!==m.indexOf("msie 6"),p=0,q=h(),r=g();d.prototype.render=function(){var a=this,b=a.elem=j(a.options.element);if(b.length&&!b.data("bind-fixed")){a._originTop=b.offset().top,a.marginTop=j.isNumeric(a.options.marginTop)?Math.min(a.options.marginTop,a._originTop):a._originTop,a._originStyles={position:null,top:null,left:null};for(var c in a._originStyles)a._originStyles.hasOwnProperty(c)&&(a._originStyles[c]=b.css(c));var d=f.isPositionFixedSupported?j.proxy(a._supportFixed,a):j.proxy(a._supportAbsolute,a);return f.isPositionFixedSupported||j("<style type='text/css'> * html { background:url(null) no-repeat fixed; } </style>").appendTo("head"),d(),j(window).on("scroll."+a._stickyId,function(){b.is(":visible")&&d()}),b.data("bind-fixed",!0),a}},d.prototype._supportFixed=function(){var a=this,b=a.elem,c=a._originTop,d=a.marginTop,e=c-k.scrollTop();if(!b.data("_fixed")&&d>=e){var f=b.offset().left;a._addPlaceholder(),b.css({position:"fixed",top:d,left:f}),b.data("_fixed",!0),j.isFunction(a.options.callback)&&a.options.callback.call(a,!0)}else b.data("_fixed")&&e>d&&a._restore()},d.prototype._supportAbsolute=function(){var a=this,b=a.elem,c=a._originTop,d=a.marginTop,e=c-k.scrollTop();d>=e?(a._addPlaceholder(),b.css({position:"absolute",top:d+k.scrollTop()}),b.data("_fixed",!0),j.isFunction(a.options.callback)&&a.options.callback.call(a,!0)):b.data("_fixed")&&e>d&&a._restore()},d.prototype._restore=function(a){var b=this,c=b.elem;b._removePlaceholder(),c.css(b._originStyles),c.data("_fixed",!1),!a&&j.isFunction(b.options.callback)&&b.options.callback.call(b,!1)},d.prototype._addPlaceholder=function(){var a=this,b=a.elem,c=!1,d=b.css("float"),e=b.css("position"),f=b.css("display");-1!==i(["static","relative"],e)&&(c=!0),"block"!==f&&(c=!1),c&&(a._placeholder=j('<div style="visibility: hidden;margin:0;padding:0;"></div>'),a._placeholder.width(b.outerWidth(!0)).height(b.outerHeight(!0)).css("float",d).insertAfter(b))},d.prototype._removePlaceholder=function(){var a=this;a._placeholder&&a._placeholder.remove()},d.prototype.destory=function(){var a=this;a._restore(1),a.elem.data("bind-fixed",!1),j(window).off("scroll."+a._stickyId)},e.prototype.render=function(){var a=this,b=a.elem=j(a.options.element);if(b.length&&!b.data("bind-fixed")){a._originTop=b.offset().top,a.marginTop=j.isNumeric(a.options.marginTop)?Math.min(a.options.marginTop,a._originTop):a._originTop,a._originStyles={position:null,top:null};for(var c in a._originStyles)a._originStyles.hasOwnProperty(c)&&(a._originStyles[c]=b.css(c));return a._supportSticky(),j(window).on("scroll."+a._stickyId,function(){b.is(":visible")&&a._supportSticky()}),b.data("bind-fixed",!0),a}},e.prototype._supportSticky=function(){var a=this,b=a.elem,c=a._originTop,d=a.marginTop,e="",f=c-k.scrollTop();if(!b.data("_fixed")&&d>=f){for(var g=0;g<l.length;g++)e+="position:"+l[g]+"sticky;";b[0].style.cssText+=e+"top: "+a.marginTop+"px;",b.data("_fixed",!0),j.isFunction(a.options.callback)&&a.options.callback.call(a,!0)}else b.data("_fixed")&&f>d&&a._restore()},e.prototype._restore=function(a){var b=this,c=b.elem;c.css(b._originStyles),c.data("_fixed",!1),!a&&j.isFunction(b.options.callback)&&b.options.callback.call(b,!1)},e.prototype.destory=function(){var a=this;a._restore(1),a.elem.data("bind-fixed",!1),j(window).off("scroll."+a._stickyId)},f.stick=f,f.fix=function(a){return new d({element:a}).render()},f.isPositionFixedSupported=r,f.isPositionStickySupported=q,c.exports=f});
diff --git a/examples/index.md b/examples/index.md
index a18bea5..8ac20e9 100644
--- a/examples/index.md
+++ b/examples/index.md
@@ -56,7 +56,7 @@
 ````javascript
 seajs.use(["$", "sticky"], function($, sticky) {
     // sticky
-    sticky.stick("#stick", 30, function(status) {
+    sticky.stick("#stick", 0, function(status) {
         if (status) {
             seajs.log("stick");
         } else {
@@ -65,14 +65,14 @@ seajs.use(["$", "sticky"], function($, sticky) {
     });
 
     // fixed
-    $('<div id="gotop">回到顶部</div>').appendTo("body");
-    sticky.fix("#gotop");
+    //$('<div id="gotop">回到顶部</div>').appendTo("body");
+    //sticky.fix("#gotop");
 
-    $('<div id="nav">顶层fixed导航</div>').appendTo("body");
-    sticky.fix("#nav");
+    //$('<div id="nav">顶层fixed导航</div>').appendTo("body");
+    //sticky.fix("#nav");
 
-    $('<div id="bottom">footer fixed</div>').appendTo("body");
-    sticky.fix("#bottom");
+    //$('<div id="bottom">footer fixed</div>').appendTo("body");
+    //sticky.fix("#bottom");
 });
 ````
     
diff --git a/package.json b/package.json
index 68f86cc..e30cc83 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
     "family": "arale",
     "name": "sticky",
-    "version": "1.2.0",
+    "version": "1.2.1",
     "keywords": ["utility"],
     "description": "实现元素跟随滚动的效果。",
     "homepage": "http://aralejs.org/sticky/",
diff --git a/src/sticky.js b/src/sticky.js
index a377271..f2f0e3f 100644
--- a/src/sticky.js
+++ b/src/sticky.js
@@ -30,7 +30,6 @@ define(function (require, exports, module) {
 
         // 记录元素原来的位置
         self._originTop = elem.offset().top;
-        self._originLeft = elem.offset().left;
         self.marginTop = $.isNumeric(self.options.marginTop) ? Math.min(self.options.marginTop, self._originTop) : self._originTop;
 
 
@@ -79,12 +78,14 @@ define(function (require, exports, module) {
         // 当距离小于等于预设的值时
         // 将元素设为 fix 状态
         if (!elem.data('_fixed') && distance <= marginTop) {
+            var offsetLeft = elem.offset().left;
+
             self._addPlaceholder();
 
             elem.css({
                 position: 'fixed',
                 top: marginTop,
-                left: self._originLeft
+                left: offsetLeft
             });
 
             elem.data('_fixed', true);
@@ -107,7 +108,6 @@ define(function (require, exports, module) {
         // 将元素设为 fix 状态
         if (distance <= marginTop) {
             self._addPlaceholder();
-
             elem.css({
                 position: 'absolute',
                 top: marginTop + doc.scrollTop()
@@ -177,8 +177,7 @@ define(function (require, exports, module) {
 
     Sticky.prototype.render = function () {
         var self = this,
-            elem = self.elem = $(self.options.element),
-            tmp = "";
+            elem = self.elem = $(self.options.element);
 
         // 一个元素只允许绑定一次
         if (!elem.length || elem.data('bind-fixed')) return;
@@ -199,12 +198,6 @@ define(function (require, exports, module) {
             }
         }
 
-        for (var i = 0; i < stickyPrefix.length; i++) {
-            tmp += "position:" + stickyPrefix[i] + "sticky;";
-        }
-
-        elem[0].style.cssText += tmp + "top: " + self.marginTop + "px;";
-
         self._supportSticky();
 
         $(window).on('scroll.'+self._stickyId, function () {
@@ -220,11 +213,18 @@ define(function (require, exports, module) {
         var self = this,
             elem = self.elem,
             originTop = self._originTop,
-            marginTop = self.marginTop;
+            marginTop = self.marginTop,
+            tmp = "";
 
         var distance = originTop - doc.scrollTop();
 
         if (!elem.data('_fixed') && distance <= marginTop) {
+            for (var i = 0; i < stickyPrefix.length; i++) {
+                tmp += "position:" + stickyPrefix[i] + "sticky;";
+            }
+
+            elem[0].style.cssText += tmp + "top: " + self.marginTop + "px;";
+
             elem.data('_fixed', true);
             // 支持 position: sticky 的是不需要占位符的
             $.isFunction(self.options.callback) && self.options.callback.call(self, true);
@@ -258,7 +258,7 @@ define(function (require, exports, module) {
 
         return (new actual({
             element: elem,
-            marginTop: marginTop,
+            marginTop: marginTop || 0,
             callback: callback
         })).render();
     }