diff --git a/packages/renderless/src/dialog-select/index.ts b/packages/renderless/src/dialog-select/index.ts
index 3984ef8a1c..a971efbfe8 100644
--- a/packages/renderless/src/dialog-select/index.ts
+++ b/packages/renderless/src/dialog-select/index.ts
@@ -300,7 +300,7 @@ const getTreeRadio = (vm) => {
   const currentRadio = vm.$refs.multiTree.state.currentRadio
   const plainNode = find(plainNodes, (plainNode) => plainNode.node.id === currentRadio.value)
 
-  return [plainNode.node.data]
+  return plainNode?.node ? [plainNode.node.data] : []
 }
 
 export const multiTreeCheck =
diff --git a/packages/renderless/src/tree/index.ts b/packages/renderless/src/tree/index.ts
index 68b91973bf..c9150134ef 100644
--- a/packages/renderless/src/tree/index.ts
+++ b/packages/renderless/src/tree/index.ts
@@ -268,6 +268,27 @@ export const dragEnd =
       dragState.showDropIndicator = false
     }
 
+const afterLoadHandler =
+  ({ state, emit, props, api }) =>
+  (params) => {
+    const { lazy, afterLoad, showRadio } = props
+    state.loaded = true
+    if (lazy) {
+      if (state.root) {
+        state.root.childNodes = [...state.root.childNodes]
+      }
+
+      if (showRadio) {
+        api.setCurrentRadio()
+      }
+    }
+    emit('load-data', params)
+
+    if (typeof afterLoad === 'function') {
+      afterLoad(params)
+    }
+  }
+
 export const initTreeStore =
   ({ api, props, state, emit }) =>
     () => {
@@ -280,12 +301,7 @@ export const initTreeStore =
       lazy,
       props: props.props,
       load,
-      afterLoad(params) {
-        !state.loaded && (state.loaded = true)
-        lazy && state.root && (state.root.childNodes = [...state.root.childNodes])
-        emit('load-data', params)
-        afterLoad && afterLoad(params)
-      },
+      afterLoad: afterLoadHandler({ api, emit, props, state }),
       currentNodeKey,
       checkStrictly,
       checkDescendants,
diff --git a/packages/theme/src/tree-menu/vars.less b/packages/theme/src/tree-menu/vars.less
index 0f7b0773a9..3a8d1969ce 100644
--- a/packages/theme/src/tree-menu/vars.less
+++ b/packages/theme/src/tree-menu/vars.less
@@ -38,5 +38,5 @@
   // 节点序号字号
   --tree-menu-node-number-font-size: var(--ti-common-font-size-base);
   // 活跃节点竖线与文本的间距
-  --tree-menu-node-vertical-line-margin-right: var(--ti-common-size-5x);
+  --tree-menu-node-vertical-line-margin-right: var(--ti-common-size-4x);
 }
diff --git a/packages/theme/src/tree/index.less b/packages/theme/src/tree/index.less
index a233989a47..731ba95eb1 100644
--- a/packages/theme/src/tree/index.less
+++ b/packages/theme/src/tree/index.less
@@ -313,11 +313,6 @@
     }
   }
 
-  &.is-root {
-    .@{tree-node-prefix-cls}__content-box {
-      padding-left: 0;
-    }
-  }
 
   &.is-leaf:not(.is-root) {
     .@{tree-node-prefix-cls}__content {
@@ -354,7 +349,7 @@
       }
     }
 
-    & label.@{css-prefix}checkbox {
+    & label.@{css-prefix}checkbox, .@{css-prefix}radio {
       margin: 0 calc(var(--ti-tree-node-label-margin-left) / 2);
     }
 
@@ -478,8 +473,6 @@
   }
 
   .@{radio-prefix-cls} {
-    margin-right: 0;
-
     .@{radio-prefix-cls}__label {
       display: none;
     }