diff --git a/src/common/hooks/useResizeHandle.ts b/src/common/hooks/useResizeHandle.ts
new file mode 100644
index 0000000..3dea0d9
--- /dev/null
+++ b/src/common/hooks/useResizeHandle.ts
@@ -0,0 +1,71 @@
+import { type Ref, onUnmounted } from 'vue'
+
+/**
+ * 拖拽调整宽度 Hook 的参数
+ */
+interface UseResizeHandleOptions {
+  /** 当前宽度响应式引用 */
+  width: Ref<number>
+  /** 宽度变更回调，传入新宽度 */
+  onWidthChange: (width: number) => void
+}
+
+/**
+ * 将侧边栏拖拽调整宽度的逻辑封装为可复用的 composable
+ *
+ * 在 mousedown 时绑定 document 级 mousemove/mouseup 监听，
+ * 拖拽过程中通过 onWidthChange 回调通知外部更新宽度（由外部负责约束范围），
+ * 拖拽结束后自动清理事件监听和全局样式。
+ *
+ * @param options - 配置项，包含宽度 ref 和变更回调
+ * @returns 返回 mousedown 事件处理器，绑定到拖拽手柄元素
+ */
+export function useResizeHandle(options: UseResizeHandleOptions): {
+  onMouseDown: (event: MouseEvent) => void
+} {
+  const { onWidthChange } = options
+
+  /** 是否正在拖拽 */
+  let isResizing = false
+
+  /**
+   * 处理 mousemove，计算新宽度并通知外部
+   */
+  const onMouseMove = (event: MouseEvent): void => {
+    if (!isResizing) return
+    onWidthChange(event.clientX)
+  }
+
+  /**
+   * 处理 mouseup，结束拖拽并清理
+   */
+  const onMouseUp = (): void => {
+    isResizing = false
+    document.removeEventListener('mousemove', onMouseMove)
+    document.removeEventListener('mouseup', onMouseUp)
+    document.body.style.userSelect = ''
+    document.body.style.cursor = ''
+  }
+
+  /**
+   * 处理 mousedown，开始拖拽
+   */
+  const onMouseDown = (event: MouseEvent): void => {
+    event.preventDefault()
+    isResizing = true
+    document.addEventListener('mousemove', onMouseMove)
+    document.addEventListener('mouseup', onMouseUp)
+    document.body.style.userSelect = 'none'
+    document.body.style.cursor = 'ew-resize'
+  }
+
+  /** 组件卸载时兜底清理 */
+  onUnmounted(() => {
+    document.removeEventListener('mousemove', onMouseMove)
+    document.removeEventListener('mouseup', onMouseUp)
+    document.body.style.userSelect = ''
+    document.body.style.cursor = ''
+  })
+
+  return { onMouseDown }
+}
diff --git a/src/layouts/BaseLayout.vue b/src/layouts/BaseLayout.vue
index 28d729e..8f0110d 100644
--- a/src/layouts/BaseLayout.vue
+++ b/src/layouts/BaseLayout.vue
@@ -11,7 +11,7 @@
     <!-- 主体区域 -->
     <div class="base-layout__main">
       <!-- 侧边栏 -->
-      <div class="base-layout__sidebar">
+      <div class="base-layout__sidebar" :style="{ width: sidebarWidth + 'px' }">
         <!-- 侧边栏内容 -->
         <div class="base-layout__sidebar-content">
           <GameList />
@@ -23,7 +23,7 @@
           </div>
         </div>
         <!-- 拖拽调整宽度的手柄 -->
-        <div class="base-layout__resize-handle"></div>
+        <div class="base-layout__resize-handle" @mousedown="onResizeMouseDown"></div>
       </div>
 
       <!-- 主内容区域 -->
@@ -40,9 +40,16 @@ import GameList from '@/components/baseLayouts/GameList.vue'
 import Lobby from '@/components/baseLayouts/Lobby.vue'
 import { useBaseLayoutStore } from '@/stores'
 import { storeToRefs } from 'pinia'
+import { useResizeHandle } from '@/common/hooks/useResizeHandle'
 
 const baseLayoutStore = useBaseLayoutStore()
-const { activeGameIcon, activeGameName } = storeToRefs(baseLayoutStore)
+const { activeGameIcon, activeGameName, sidebarWidth } = storeToRefs(baseLayoutStore)
+
+/** 拖拽手柄事件处理器 */
+const { onMouseDown: onResizeMouseDown } = useResizeHandle({
+  width: sidebarWidth,
+  onWidthChange: (width) => baseLayoutStore.setSidebarWidth(width)
+})
 </script>
 
 <style scoped lang="scss">
diff --git a/src/stores/modules/baseLayout.ts b/src/stores/modules/baseLayout.ts
index f6fb8c0..a6587c2 100644
--- a/src/stores/modules/baseLayout.ts
+++ b/src/stores/modules/baseLayout.ts
@@ -1,6 +1,13 @@
 import { defineStore } from 'pinia'
 import { ref } from 'vue'
 
+/** 侧边栏最小宽度 */
+export const MIN_SIDEBAR_WIDTH = 200
+/** 侧边栏最大宽度 */
+export const MAX_SIDEBAR_WIDTH = 650
+/** 侧边栏默认宽度 */
+export const DEFAULT_SIDEBAR_WIDTH = 400
+
 export const useBaseLayoutStore = defineStore(
   'baseLayout',
   () => {
@@ -12,6 +19,8 @@ export const useBaseLayoutStore = defineStore(
     const activeGameIcon = ref<string>('🐍')
     /** 当前选中的游戏名称 */
     const activeGameName = ref<string>('贪吃蛇')
+    /** 侧边栏当前宽度 */
+    const sidebarWidth = ref<number>(DEFAULT_SIDEBAR_WIDTH)
 
     /**
      * 设置顶部导航栏标题
@@ -33,13 +42,23 @@ export const useBaseLayoutStore = defineStore(
       activeGameName.value = name
     }
 
+    /**
+     * 设置侧边栏宽度，自动约束在最小和最大值之间
+     * @param width - 新宽度（px）
+     */
+    const setSidebarWidth = (width: number): void => {
+      sidebarWidth.value = Math.min(Math.max(width, MIN_SIDEBAR_WIDTH), MAX_SIDEBAR_WIDTH)
+    }
+
     return {
       topbarTitle,
       activeGameId,
       activeGameIcon,
       activeGameName,
+      sidebarWidth,
       setTopbarTitle,
-      setActiveGame
+      setActiveGame,
+      setSidebarWidth
     }
   },
   {