diff --git a/packages/backend/src/settings/settings.controller.ts b/packages/backend/src/settings/settings.controller.ts
index 955a5d9..103c941 100644
--- a/packages/backend/src/settings/settings.controller.ts
+++ b/packages/backend/src/settings/settings.controller.ts
@@ -36,7 +36,9 @@ export const settingsController = {
           'showPopupFileEditor', 'shareFileEditorTabs', 'ipWhitelistEnabled',
           'autoCopyOnSelect', 'dockerStatusIntervalSeconds', 'dockerDefaultExpand',
           'statusMonitorIntervalSeconds', // +++ 添加状态监控间隔键 +++
-          'workspaceSidebarPersistent' // +++ 添加侧边栏固定键 +++
+          'workspaceSidebarPersistent', // +++ 添加侧边栏固定键 +++
+          'leftSidebarWidth', // +++ 添加左侧栏宽度键 +++
+          'rightSidebarWidth' // +++ 添加右侧栏宽度键 +++
       ];
       const filteredSettings: Record<string, string> = {};
       for (const key in settingsToUpdate) {
diff --git a/packages/frontend/src/components/LayoutRenderer.vue b/packages/frontend/src/components/LayoutRenderer.vue
index 86b2ff7..d916468 100644
--- a/packages/frontend/src/components/LayoutRenderer.vue
+++ b/packages/frontend/src/components/LayoutRenderer.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, defineAsyncComponent, type PropType, type Component, ref, watch } from 'vue';
+import { computed, defineAsyncComponent, type PropType, type Component, ref, watch, onMounted } from 'vue'; // +++ Add onMounted +++
 import { useI18n } from 'vue-i18n'; // <-- Import useI18n
 // 添加依赖 font-awesome
 import '@fortawesome/fontawesome-free/css/all.min.css';
@@ -8,6 +8,7 @@ import { useLayoutStore, type LayoutNode, type PaneName } from '../stores/layout
 import { useSessionStore } from '../stores/session.store';
 import { useFileEditorStore } from '../stores/fileEditor.store'; // <-- Import FileEditorStore
 import { useSettingsStore } from '../stores/settings.store'; // +++ Import SettingsStore +++
+import { useSidebarResize } from '../composables/useSidebarResize'; // +++ Import useSidebarResize +++
 import { storeToRefs } from 'pinia';
 import { defineEmits } from 'vue';
 
@@ -71,13 +72,17 @@ const fileEditorStore = useFileEditorStore(); // <-- Initialize FileEditorStore
 const settingsStore = useSettingsStore(); // +++ Initialize SettingsStore +++
 const { t } = useI18n(); // <-- Get translation function
 const { activeSession } = storeToRefs(sessionStore);
-const { workspaceSidebarPersistentBoolean } = storeToRefs(settingsStore); // +++ Get sidebar setting +++
+const { workspaceSidebarPersistentBoolean, leftSidebarWidthPx, rightSidebarWidthPx } = storeToRefs(settingsStore); // +++ Get sidebar setting and width getters +++
 const { sidebarPanes } = storeToRefs(layoutStore);
 const { orderedTabs: editorTabsFromStore, activeTabId: activeEditorTabIdFromStore } = storeToRefs(fileEditorStore); // <-- Get editor state
 
 // --- Sidebar State ---
 const activeLeftSidebarPane = ref<PaneName | null>(null);
 const activeRightSidebarPane = ref<PaneName | null>(null);
+const leftSidebarPanelRef = ref<HTMLElement | null>(null); // +++ Ref for left panel +++
+const rightSidebarPanelRef = ref<HTMLElement | null>(null); // +++ Ref for right panel +++
+const leftResizeHandleRef = ref<HTMLElement | null>(null); // +++ Ref for left handle +++
+const rightResizeHandleRef = ref<HTMLElement | null>(null); // +++ Ref for right handle +++
 
 // --- Component Mapping ---
 // 使用 defineAsyncComponent 优化加载，并映射 PaneName 到实际组件
@@ -385,6 +390,32 @@ const getIconClasses = (paneName: PaneName): string[] => {
   }
 };
 
+
+// --- Sidebar Resize Logic ---
+onMounted(() => {
+  // Left Sidebar Resize
+  useSidebarResize({
+    sidebarRef: leftSidebarPanelRef,
+    handleRef: leftResizeHandleRef,
+    side: 'left',
+    onResizeEnd: (newWidth) => {
+      console.log(`Left sidebar resize ended. New width: ${newWidth}px`);
+      settingsStore.updateSetting('leftSidebarWidth', `${newWidth}px`);
+    },
+  });
+
+  // Right Sidebar Resize
+  useSidebarResize({
+    sidebarRef: rightSidebarPanelRef,
+    handleRef: rightResizeHandleRef,
+    side: 'right',
+    onResizeEnd: (newWidth) => {
+      console.log(`Right sidebar resize ended. New width: ${newWidth}px`);
+      settingsStore.updateSetting('rightSidebarWidth', `${newWidth}px`);
+    },
+  });
+});
+
 </script>
 
 <template>
@@ -550,11 +581,11 @@ const getIconClasses = (paneName: PaneName): string[] => {
     <div
         v-if="activeLeftSidebarPane || activeRightSidebarPane"
         class="sidebar-overlay"
-
     ></div>
 
     <!-- Left Sidebar Panel -->
-    <div :class="['sidebar-panel', 'left-sidebar-panel', { active: !!activeLeftSidebarPane }]">
+    <div ref="leftSidebarPanelRef" :class="['sidebar-panel', 'left-sidebar-panel', { active: !!activeLeftSidebarPane }]" :style="{ width: leftSidebarWidthPx }"> <!-- +++ Add ref and bind width +++ -->
+        <div ref="leftResizeHandleRef" class="resize-handle left-handle"></div> <!-- +++ Left Handle +++ -->
         <button class="close-sidebar-btn" @click="closeSidebars" title="Close Sidebar">&times;</button>
         <component
             v-if="currentLeftSidebarComponent && activeLeftSidebarPane && (!['fileManager', 'statusMonitor'].includes(activeLeftSidebarPane) || activeSession)"
@@ -581,7 +612,8 @@ const getIconClasses = (paneName: PaneName): string[] => {
     </div>
 
     <!-- Right Sidebar Panel -->
-     <div :class="['sidebar-panel', 'right-sidebar-panel', { active: !!activeRightSidebarPane }]">
+     <div ref="rightSidebarPanelRef" :class="['sidebar-panel', 'right-sidebar-panel', { active: !!activeRightSidebarPane }]" :style="{ width: rightSidebarWidthPx }"> <!-- +++ Add ref and bind width +++ -->
+        <div ref="rightResizeHandleRef" class="resize-handle right-handle"></div> <!-- +++ Right Handle +++ -->
         <button class="close-sidebar-btn" @click="closeSidebars" title="Close Sidebar">&times;</button>
         <component
             v-if="currentRightSidebarComponent && activeRightSidebarPane && (!['fileManager', 'statusMonitor'].includes(activeRightSidebarPane) || activeSession)"
@@ -778,9 +810,9 @@ const getIconClasses = (paneName: PaneName): string[] => {
   left: 0;
   width: 100%;
   height: 100%;
-  /* background-color: rgba(0, 0, 0, 0.4); */ /* <-- 移除背景色 */
-  background-color: transparent; /* <-- 确保完全透明 */
-  pointer-events: none; /* <-- 不拦截鼠标事件 */
+  /* background-color: rgba(0, 0, 0, 0.4); */ /* <-- 移除背景色 --> */
+  background-color: transparent; /* <-- 确保完全透明 --> */
+  pointer-events: none; /* <-- 不拦截鼠标事件 --> */
   z-index: 100; /* Below panel, above main content */
   opacity: 0;
   visibility: hidden;
@@ -798,13 +830,13 @@ const getIconClasses = (paneName: PaneName): string[] => {
   position: fixed; /* Use fixed for viewport positioning */
   top: 0; /* Adjust if you have a fixed header */
   bottom: 0; /* Adjust if you have a fixed footer */
-  width: 350px; /* Adjust width as needed */
+  /* width: 350px; */ /* Width is now controlled by style binding */
   max-width: 80vw;
   background-color: var(--app-bg-color, white);
-  /* box-shadow: 0 0 15px rgba(0, 0, 0, 0.2); */ /* <-- 移除阴影以隐藏边缘 */
+  /* box-shadow: 0 0 15px rgba(0, 0, 0, 0.2); */ /* <-- 移除阴影以隐藏边缘 --> */
   z-index: 110; /* Above overlay */
   transform: translateX(-100%); /* Start hidden */
-  transition: transform 0.3s ease-in-out;
+  transition: transform 0.3s ease-in-out; /* Keep transition for sliding */
   display: flex;
   flex-direction: column;
   overflow: hidden; /* Prevent content overflow */
@@ -853,6 +885,27 @@ const getIconClasses = (paneName: PaneName): string[] => {
   padding-top: 2.5rem; /* Add padding to avoid close button overlap */
 }
 
+/* Resize Handle Styles */
+.resize-handle {
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  width: 8px; /* Increased width for easier interaction */
+  cursor: col-resize;
+  z-index: 120; /* Above panel content */
+  background-color: transparent; /* Make it invisible by default */
+  transition: background-color 0.2s ease;
+}
+.resize-handle:hover {
+   background-color: var(--primary-color-light, #a0cfff); /* Highlight on hover */
+}
+.left-handle {
+  right: -4px; /* Adjusted position for increased width */
+}
+.right-handle {
+  left: -4px; /* Adjusted position for increased width */
+}
+
 </style>
 
 <style> /* Global styles for splitpanes if needed, or scoped with :deep() */
diff --git a/packages/frontend/src/composables/useSidebarResize.ts b/packages/frontend/src/composables/useSidebarResize.ts
new file mode 100644
index 0000000..4a63b9c
--- /dev/null
+++ b/packages/frontend/src/composables/useSidebarResize.ts
@@ -0,0 +1,101 @@
+import { ref, onMounted, onUnmounted, type Ref, watch } from 'vue'; // +++ Import watch +++
+
+interface UseSidebarResizeOptions {
+  sidebarRef: Ref<HTMLElement | null>;
+  handleRef: Ref<HTMLElement | null>;
+  side: 'left' | 'right';
+  minWidth?: number;
+  maxWidth?: number;
+  onResizeEnd?: (newWidth: number) => void;
+}
+
+export function useSidebarResize({
+  sidebarRef,
+  handleRef,
+  side,
+  minWidth = 200, // 默认最小宽度
+  maxWidth = 800, // 默认最大宽度
+  onResizeEnd,
+}: UseSidebarResizeOptions) {
+  const isDragging = ref(false);
+  const startX = ref(0);
+  const startWidth = ref(0);
+
+  const handleMouseDown = (event: MouseEvent) => {
+    console.log(`[useSidebarResize] handleMouseDown triggered for side: ${side}`, { sidebar: sidebarRef.value, handle: handleRef.value }); // +++ Add Log +++
+    if (!sidebarRef.value || !handleRef.value) {
+       console.log('[useSidebarResize] MouseDown ignored: sidebarRef or handleRef is null.'); // +++ Add Log +++
+       return;
+    }
+
+    isDragging.value = true;
+    startX.value = event.clientX;
+    startWidth.value = sidebarRef.value.offsetWidth;
+    document.body.style.cursor = 'col-resize'; // 改变鼠标样式
+    document.body.style.userSelect = 'none'; // 禁止选择文本
+
+    document.addEventListener('mousemove', handleMouseMove);
+    document.addEventListener('mouseup', handleMouseUp);
+  };
+
+  const handleMouseMove = (event: MouseEvent) => {
+    if (!isDragging.value || !sidebarRef.value) return;
+
+    const currentX = event.clientX;
+    const deltaX = currentX - startX.value;
+    let newWidth: number;
+
+    if (side === 'left') {
+      newWidth = startWidth.value + deltaX;
+    } else { // side === 'right'
+      newWidth = startWidth.value - deltaX;
+    }
+
+    // 应用宽度限制
+    newWidth = Math.max(minWidth, Math.min(newWidth, maxWidth));
+
+    sidebarRef.value.style.width = `${newWidth}px`;
+  };
+
+  const handleMouseUp = () => {
+    if (!isDragging.value) return;
+
+    isDragging.value = false;
+    document.body.style.cursor = ''; // 恢复鼠标样式
+    document.body.style.userSelect = ''; // 恢复文本选择
+
+    document.removeEventListener('mousemove', handleMouseMove);
+    document.removeEventListener('mouseup', handleMouseUp);
+
+    if (sidebarRef.value && onResizeEnd) {
+      onResizeEnd(sidebarRef.value.offsetWidth); // 传递最终宽度
+    }
+  };
+
+  // 使用 watch 监视 handleRef 的变化
+  watch(handleRef, (newHandle, oldHandle) => {
+    // 移除旧句柄上的监听器（如果存在）
+    if (oldHandle) {
+      oldHandle.removeEventListener('mousedown', handleMouseDown);
+    }
+    // 在新句柄上添加监听器（如果存在）
+    if (newHandle) {
+      newHandle.addEventListener('mousedown', handleMouseDown);
+    }
+  }, { immediate: true }); // immediate: true 确保初始时也能尝试附加
+
+  onUnmounted(() => {
+    // 组件卸载时确保移除监听器
+    if (handleRef.value) {
+      handleRef.value.removeEventListener('mousedown', handleMouseDown);
+    }
+    // 清理可能残留的全局监听器
+    document.removeEventListener('mousemove', handleMouseMove);
+    document.removeEventListener('mouseup', handleMouseUp);
+    document.body.style.cursor = '';
+    document.body.style.userSelect = '';
+  });
+
+  // 返回 isDragging 状态，可能用于 UI 反馈
+  return { isDragging };
+}
\ No newline at end of file
diff --git a/packages/frontend/src/stores/settings.store.ts b/packages/frontend/src/stores/settings.store.ts
index 1a12322..2d4a7ca 100644
--- a/packages/frontend/src/stores/settings.store.ts
+++ b/packages/frontend/src/stores/settings.store.ts
@@ -18,8 +18,10 @@ interface SettingsState {
   dockerDefaultExpand?: string; // NEW: Docker 默认展开详情 'true' or 'false'
   statusMonitorIntervalSeconds?: string; // NEW: 状态监控轮询间隔 (秒)
   workspaceSidebarPersistent?: string; // NEW: 工作区侧边栏是否固定 'true' or 'false'
-  // Add other general settings keys here as needed
-  [key: string]: string | undefined; // Allow other string settings
+  leftSidebarWidth?: string; // NEW: 左侧边栏宽度 (e.g., '350px')
+  rightSidebarWidth?: string; // NEW: 右侧边栏宽度 (e.g., '350px')
+ // Add other general settings keys here as needed
+ [key: string]: string | undefined; // Allow other string settings
 }
 
 
@@ -84,6 +86,13 @@ export const useSettingsStore = defineStore('settings', () => {
       if (settings.value.workspaceSidebarPersistent === undefined) {
           settings.value.workspaceSidebarPersistent = 'false'; // 默认不固定
       }
+      // NEW: Sidebar width defaults
+      if (settings.value.leftSidebarWidth === undefined) {
+          settings.value.leftSidebarWidth = '350px'; // 默认宽度
+      }
+      if (settings.value.rightSidebarWidth === undefined) {
+          settings.value.rightSidebarWidth = '350px'; // 默认宽度
+      }
 
       // --- 语言设置 ---
       const langFromSettings = settings.value.language;
@@ -135,7 +144,9 @@ export const useSettingsStore = defineStore('settings', () => {
         'showPopupFileEditor', 'shareFileEditorTabs', 'ipWhitelistEnabled',
         'autoCopyOnSelect', 'dockerStatusIntervalSeconds', 'dockerDefaultExpand',
         'statusMonitorIntervalSeconds', // +++ 添加状态监控间隔键 +++
-        'workspaceSidebarPersistent' // +++ 添加侧边栏固定键 +++
+        'workspaceSidebarPersistent', // +++ 添加侧边栏固定键 +++
+        'leftSidebarWidth', // +++ 添加左侧栏宽度键 +++
+        'rightSidebarWidth' // +++ 添加右侧栏宽度键 +++
     ];
     if (!allowedKeys.includes(key)) {
         console.error(`[SettingsStore] 尝试更新不允许的设置键: ${key}`);
@@ -170,7 +181,9 @@ export const useSettingsStore = defineStore('settings', () => {
         'showPopupFileEditor', 'shareFileEditorTabs', 'ipWhitelistEnabled',
         'autoCopyOnSelect', 'dockerStatusIntervalSeconds', 'dockerDefaultExpand',
         'statusMonitorIntervalSeconds', // +++ 添加状态监控间隔键 +++
-        'workspaceSidebarPersistent' // +++ 添加侧边栏固定键 +++
+        'workspaceSidebarPersistent', // +++ 添加侧边栏固定键 +++
+        'leftSidebarWidth', // +++ 添加左侧栏宽度键 +++
+        'rightSidebarWidth' // +++ 添加右侧栏宽度键 +++
     ];
     const filteredUpdates: Partial<SettingsState> = {};
     let languageUpdate: 'en' | 'zh' | undefined = undefined;
@@ -237,6 +250,12 @@ export const useSettingsStore = defineStore('settings', () => {
       return settings.value.workspaceSidebarPersistent === 'true';
   });
 
+  // NEW: Getter for left sidebar width
+  const leftSidebarWidthPx = computed(() => settings.value.leftSidebarWidth || '350px');
+
+  // NEW: Getter for right sidebar width
+  const rightSidebarWidthPx = computed(() => settings.value.rightSidebarWidth || '350px');
+
   // NEW: Getter for Docker default expand setting, returning boolean
   const dockerDefaultExpandBoolean = computed(() => {
       return settings.value.dockerDefaultExpand === 'true';
@@ -260,6 +279,8 @@ export const useSettingsStore = defineStore('settings', () => {
     dockerDefaultExpandBoolean, // +++ 暴露 Docker 默认展开 getter +++
     statusMonitorIntervalSecondsNumber, // +++ 暴露状态监控间隔 getter +++
     workspaceSidebarPersistentBoolean, // +++ 暴露侧边栏固定 getter +++
+    leftSidebarWidthPx, // +++ 暴露左侧栏宽度 getter +++
+    rightSidebarWidthPx, // +++ 暴露右侧栏宽度 getter +++
     // 移除外观相关的 getters 和 actions
     loadInitialSettings,
     updateSetting,