diff --git a/src/layout/index.vue b/src/layout/index.vue
index 1c2190e0..2b8580a9 100644
--- a/src/layout/index.vue
+++ b/src/layout/index.vue
@@ -287,9 +287,28 @@ onMounted(async () => {
       })
     }
 
-    // 恢复大小
+    // 恢复大小（验证尺寸有效性）
     if (globalStore.homeWindowState.width && globalStore.homeWindowState.height) {
-      await homeWindow.setSize(new LogicalSize(globalStore.homeWindowState.width, globalStore.homeWindowState.height))
+      const MIN_WIDTH = 330
+      const MIN_HEIGHT = 480
+      const DEFAULT_WIDTH = 960
+      const DEFAULT_HEIGHT = 720
+
+      let targetWidth = globalStore.homeWindowState.width
+      let targetHeight = globalStore.homeWindowState.height
+
+      // 如果窗口大小异常，使用默认值
+      if (targetWidth < MIN_WIDTH || targetHeight < MIN_HEIGHT) {
+        info(
+          `[layout] 检测到窗口大小异常 (${targetWidth}x${targetHeight})，使用默认值 (${DEFAULT_WIDTH}x${DEFAULT_HEIGHT})`
+        )
+        targetWidth = DEFAULT_WIDTH
+        targetHeight = DEFAULT_HEIGHT
+        // 同步更新到 store
+        globalStore.setHomeWindowState({ width: targetWidth, height: targetHeight })
+      }
+
+      await homeWindow.setSize(new LogicalSize(targetWidth, targetHeight))
     }
     // 居中
     await homeWindow.center()
diff --git a/src/stores/global.ts b/src/stores/global.ts
index ee93b496..10d94ee2 100644
--- a/src/stores/global.ts
+++ b/src/stores/global.ts
@@ -82,7 +82,23 @@ export const useGlobalStore = defineStore(
 
     // 设置home窗口位置、宽高信息
     const setHomeWindowState = (newState: { width: number; height: number }) => {
-      homeWindowState.value = { ...homeWindowState.value, ...newState }
+      // 验证窗口大小，如果小于最小限制，则使用默认值
+      const MIN_WIDTH = 330
+      const MIN_HEIGHT = 480
+      const DEFAULT_WIDTH = 960
+      const DEFAULT_HEIGHT = 720
+
+      if (newState.width < MIN_WIDTH || newState.height < MIN_HEIGHT) {
+        info(
+          `[global] 窗口大小异常 (${newState.width}x${newState.height})，强制设置为默认值 (${DEFAULT_WIDTH}x${DEFAULT_HEIGHT})`
+        )
+        homeWindowState.value = {
+          width: DEFAULT_WIDTH,
+          height: DEFAULT_HEIGHT
+        }
+      } else {
+        homeWindowState.value = { ...homeWindowState.value, ...newState }
+      }
     }
 
     // 更新全局未读消息计数