diff --git a/src/UI/Components/ToolBar/Layer/LayerManager.tsx b/src/UI/Components/ToolBar/Layer/LayerManager.tsx
index b96bfa612..7c88cc967 100644
--- a/src/UI/Components/ToolBar/Layer/LayerManager.tsx
+++ b/src/UI/Components/ToolBar/Layer/LayerManager.tsx
@@ -151,25 +151,28 @@ export class LayerManager extends React.Component<{}, {}>
                         SelectLayerEntitys(selected);
                     }}
                 />
-                <MenuItem
-                    icon="inheritance"
-                    text="将选中实体置为该图层"
-                    onClick={() =>
-                    {
-                        this.ClickInnerEvent(e);
-                        const ens = app.Editor.SelectCtrl.SelectSet.SelectEntityList;
-                        if (ens.length > 0)
-                            LayerCMD.PutEntitysInLayer(ens, selected);
-                        else
+                {
+                    !selected.children &&
+                    <MenuItem
+                        icon="inheritance"
+                        text="将选中实体置为该图层"
+                        onClick={() =>
                         {
-                            AppToaster.show({
-                                message: "请先选中实体",
-                                timeout: 2000,
-                                intent: Intent.DANGER
-                            }, 'openfile');
-                        }
-                    }}
-                />
+                            this.ClickInnerEvent(e);
+                            const ens = app.Editor.SelectCtrl.SelectSet.SelectEntityList;
+                            if (ens.length > 0)
+                                LayerCMD.PutEntitysInLayer(ens, selected);
+                            else
+                            {
+                                AppToaster.show({
+                                    message: "请先选中实体",
+                                    timeout: 2000,
+                                    intent: Intent.DANGER
+                                }, 'openfile');
+                            }
+                        }}
+                    />
+                }
             </Menu>,
             { left: e.clientX, top: e.clientY },
             () => this.setState({ isContextMenuOpen: false }),
@@ -219,9 +222,13 @@ export class LayerManager extends React.Component<{}, {}>
                                         const line = dom.children[0] as HTMLDivElement;
                                         const key = dom.getAttribute("data-key");
                                         const node = TreeAction.FindNode(layerStore.data, (node: ILayerNode) => node.name === key);
+                                        const isInSelf = data.name === key;
+                                        // 拖拽到文件夹里
                                         if (e.clientY > rect.top && e.clientY < rect.bottom && node.children)
                                         {
-                                            if (!data.children || !TreeAction.FindNode(data.children, (node: ILayerNode) => node.name === key))
+                                            const isInChildren = data.children && TreeAction.FindNode(node.children, (node: ILayerNode) => node.name === key);
+                                            // 确保不拖拽到自身及其子文件里
+                                            if (!isInSelf && !isInChildren)
                                             {
                                                 const div = dom.children[1] as HTMLDivElement;
                                                 div.style.background = "rgba(150, 180, 210, 0.5)";
@@ -230,11 +237,17 @@ export class LayerManager extends React.Component<{}, {}>
                                                 return;
                                             }
                                         }
+                                        // 拖拽到文件上方
                                         if (e.clientY < boundary)
                                         {
-                                            line.style.height = "5px";
-                                            this._ToWhere = key;
-                                            return;
+                                            const isInChildren = data.children && TreeAction.FindNode(data.children, (node: ILayerNode) => node.name === key);
+                                            // 确保不拖拽到自身及其子文件里
+                                            if (!isInSelf && !isInChildren)
+                                            {
+                                                line.style.height = "5px";
+                                                this._ToWhere = key;
+                                                return;
+                                            }
                                         }
                                     }
                                     this._ToWhere = "--LAST";
@@ -383,7 +396,7 @@ export class LayerManager extends React.Component<{}, {}>
                             </div>
                         </div>
                     }
-                    {data.expanded && data.children && this.CreateList(data.children)}
+                    {data.expanded && data.children && data.children.length > 0 && this.CreateList(data.children)}
                 </>);
             })
         );