diff --git a/.gitignore b/.gitignore
index 97c1739..efeb07a 100755
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@
 .nyc_output/
 node_modules/
 test/assets/debug.js
+test/assets/debug.json
 package-lock.json
diff --git a/lib/index.js b/lib/index.js
index d5ad347..c88f3b1 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -52,7 +52,7 @@ class XLSX2JSON {
 		// 自定义解析后的缓存
 		this.parse2jsonDataCache = [];
 		// 解析过程，记录一些覆盖赋值的情况。
-		this.parse2jsonCover = [];
+		this.parse2jsonCover = new Set();
 	}
 	/**
 	 * Rotate each'sheet'structure. Fill in the blank'cell'
@@ -118,7 +118,7 @@ class XLSX2JSON {
 		}
 		return keyPartDescription;
 	}
-	createJsonEnumCol(columnObject, key, value, colIndex) {
+	createJsonEnumCol(columnObject, key, value, colIndex, rowIndex, sheetIndex) {
 		if (key === '') return ;
 		if (typeof key !== 'object') {
 			key = key.split('.');
@@ -136,7 +136,7 @@ class XLSX2JSON {
 			let requireSheetResult = this.parsedXlsxData[requireSheetIndex].data;
 
 			requireSheetResult = this.convertProcess(requireSheetResult, requireSheetIndex)[colIndex];
-			return this.createJsonEnumCol(columnObject, keyPart, requireSheetResult, colIndex);
+			return this.createJsonEnumCol(columnObject, keyPart, requireSheetResult, colIndex, rowIndex, requireSheetIndex);
 		}
 		const keyFirstPartDesc = this.analysisAttrDesc(keyPart);
 		const keyPartIsArr = keyFirstPartDesc[0];
@@ -148,32 +148,32 @@ class XLSX2JSON {
       if (columnObject[keyPartKeyName] === undefined) {
         columnObject[keyPartKeyName] = [];
       } else if (!Array.isArray(columnObject[keyPartKeyName])) {
-        this.parse2jsonCover.push(`${XLSX2JSON.getJsonCoverKey(keyPart, key)}`);
+        this.collectCoverKey(sheetIndex, rowIndex);
         columnObject[keyPartKeyName] = [];
       }
       if (keyPartKeyIndex === null) {
         columnObject[keyPartKeyName].push(isKeyPartEnd ? value : {});
       } else {
         if (columnObject[keyPartKeyName][keyPartKeyIndex] !== undefined) {
-          this.parse2jsonCover.push(`${XLSX2JSON.getJsonCoverKey(keyPart, key)}`);
+          this.collectCoverKey(sheetIndex, rowIndex);
         }
         columnObject[keyPartKeyName][keyPartKeyIndex] = isKeyPartEnd ? value : {};
       }
       const quoteIndex = keyPartKeyIndex || columnObject[keyPartKeyName].length - 1;
-      return this.createJsonEnumCol(columnObject[keyPartKeyName][quoteIndex], key, value, colIndex);
+      return this.createJsonEnumCol(columnObject[keyPartKeyName][quoteIndex], key, value, colIndex, rowIndex, sheetIndex);
     } else {
       if (columnObject[keyPartKeyName] === undefined) {
         columnObject[keyPartKeyName] = isKeyPartEnd ? value : {};
       } else if (Object.prototype.toString.call(columnObject[keyPartKeyName]) !== '[object Object]') {
-        this.parse2jsonCover.push(`${XLSX2JSON.getJsonCoverKey(keyPart, key)}`);
+        this.collectCoverKey(sheetIndex, rowIndex);
         columnObject[keyPartKeyName] = isKeyPartEnd ? value : {};
       }else {
         if (isKeyPartEnd) {
-          this.parse2jsonCover.push(`${XLSX2JSON.getJsonCoverKey(keyPart, key)}`);
+          this.collectCoverKey(sheetIndex, rowIndex);
           columnObject[keyPartKeyName] = value;
         }
       }
-      return this.createJsonEnumCol(columnObject[keyPartKeyName], key, value, colIndex);
+      return this.createJsonEnumCol(columnObject[keyPartKeyName], key, value, colIndex, rowIndex, sheetIndex);
     }
 	}
 	convertProcess(sheetData, sheetIndex = 0) {
@@ -191,7 +191,7 @@ class XLSX2JSON {
 			for (let j = 0, lenJ = colValueArr.length; j < lenJ; j += 1) {
 
 				// 返回此次tab[].c 数显转换后的深度结构的属性引用。
-				this.createJsonEnumCol(colValueJson, attrDescArr[j],  colValueArr[j], i - 1);
+				this.createJsonEnumCol(colValueJson, attrDescArr[j],  colValueArr[j], i - 1, j, sheetIndex);
 			}
 			parsedJson.push(colValueJson);
 		}
@@ -219,8 +219,11 @@ class XLSX2JSON {
 		}
 		return index;
 	}
-	static getJsonCoverKey(keyPart, key) {
-	  return `${keyPart}${key.length ? '.' + key.join('.') : ''}`;
+  collectCoverKey(sheetIndex, rowIndex) {
+	  const sheetName = this.parsedXlsxData[sheetIndex].sheetName;
+	  const keyDescName = this.parsedXlsxData[sheetIndex].data[0][rowIndex];
+	  const msg = `sheet name "${sheetName}", row ${rowIndex}, value "${keyDescName}"`;
+	  this.parse2jsonCover.add(msg);
   }
 }
 
diff --git a/package.json b/package.json
index 63e312c..37cf2d3 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "xlsx-json-js",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "description": "Parse the'xlsx'file as JSON according to a set of attribute description syntax.",
   "main": "lib/index.js",
   "scripts": {