diff --git a/src/renderer/components/Sidebar/Sidebar.tsx b/src/renderer/components/Sidebar/Sidebar.tsx
index a701146..f376fc6 100644
--- a/src/renderer/components/Sidebar/Sidebar.tsx
+++ b/src/renderer/components/Sidebar/Sidebar.tsx
@@ -18,6 +18,9 @@ export function Sidebar() {
   const setTree = useSidebarStore(s => s.setTree)
   const isVisible = useSidebarStore(s => s.isVisible)
 
+  // 计算当前活动标签的文件路径（用于文件树高亮）
+  const activeFilePath = tabs.find(t => t.id === activeTabId)?.filePath ?? null
+
   const [isResizing, setIsResizing] = useState(false)
   const sidebarRef = useRef<HTMLDivElement>(null)
 
@@ -139,6 +142,7 @@ export function Sidebar() {
               expandedDirs={expandedDirs}
               toggleDir={toggleDir}
               activeTabId={activeTabId}
+              activeFilePath={activeFilePath}
               onFileClick={handleFileClick}
             />
           </>
@@ -155,12 +159,13 @@ export function Sidebar() {
 }
 
 // 文件树递归组件
-function FileTree({ nodes, depth, expandedDirs, toggleDir, activeTabId, onFileClick }: {
+function FileTree({ nodes, depth, expandedDirs, toggleDir, activeTabId, activeFilePath, onFileClick }: {
   nodes: FileNode[]
   depth: number
   expandedDirs: Set<string>
   toggleDir: (path: string) => void
   activeTabId: string | null
+  activeFilePath: string | null
   onFileClick: (path: string) => void
 }) {
   return (
@@ -168,7 +173,7 @@ function FileTree({ nodes, depth, expandedDirs, toggleDir, activeTabId, onFileCl
       {nodes.map(node => (
         <React.Fragment key={node.path}>
           <div
-            className={`tree-item ${node.type === 'file' && activeTabId ? '' : ''}`}
+            className={`tree-item ${node.type === 'file' && node.path === activeFilePath ? 'active' : ''}`}
             style={{ paddingLeft: (8 + depth * 16) + 'px' }}
             onClick={() => {
               if (node.type === 'dir') {
@@ -211,6 +216,7 @@ function FileTree({ nodes, depth, expandedDirs, toggleDir, activeTabId, onFileCl
               expandedDirs={expandedDirs}
               toggleDir={toggleDir}
               activeTabId={activeTabId}
+              activeFilePath={activeFilePath}
               onFileClick={onFileClick}
             />
           )}