diff --git a/src/components/exam/ExamSignPanel.tsx b/src/components/exam/ExamSignPanel.tsx
index b781ebc..781a882 100644
--- a/src/components/exam/ExamSignPanel.tsx
+++ b/src/components/exam/ExamSignPanel.tsx
@@ -39,7 +39,7 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
     return () => onBusyChange?.(false);
   }, [busy, onBusyChange]);
 
-  const SIGN_STORAGE_KEY = 'yh_signed_consents';
+  const SIGN_STORAGE_KEY = `yh_signed_consents_${new Date().toISOString().slice(0, 10)}`;
 
   const handlePickFile = () => {
     fileInputRef.current?.click();
diff --git a/src/components/home/HomeSection.tsx b/src/components/home/HomeSection.tsx
index 8297819..0a40303 100644
--- a/src/components/home/HomeSection.tsx
+++ b/src/components/home/HomeSection.tsx
@@ -2,6 +2,7 @@ import { useEffect, useMemo, useState } from 'react';
 import { getRevenueStatistics, getTodayExamStatistics, getUserOwnedMenus, getB1ServiceBoard, getNorth3ServiceBoard } from '../../api';
 import type { B1ServiceInfo, OutputNorth3ServiceBoard } from '../../api/types';
 import { Card, CardContent, CardHeader, InfoCard } from '../ui';
+import { cleanLocalStorageIfNeeded } from '../../utils/clean';
 
 const APP_ID = 'b2b49e91d21446aeb14579930f732985';
 
@@ -38,6 +39,10 @@ export const HomeSection = () => {
   }), []);
 
   useEffect(() => {
+
+    // 清理本地存储
+    cleanLocalStorageIfNeeded();
+
     getTodayExamStatistics({})
       .then((res) => {
         const d = res.Data;
diff --git a/src/utils/clean.ts b/src/utils/clean.ts
new file mode 100644
index 0000000..4305a5d
--- /dev/null
+++ b/src/utils/clean.ts
@@ -0,0 +1,79 @@
+import { getTodayString } from './examActions';
+
+/**
+ * 本地存储清理 - 上次清理日期 key
+ */
+const CLEAN_LAST_TIME_KEY = 'yh_local_clean_last_time';
+
+/**
+ * 按日期清理本地存储中的体检相关缓存数据
+ *
+ * 规则：
+ * - 仅在「从未清理过」或「上次清理日期早于今天」时执行清理
+ * - 删除所有日期不是今天的 key，匹配示例：
+ *   - yh_tongyishu_pdf_list_2025-12-24_100057962
+ *   - yh_exam_actions_2025-12-24_100057962
+ *   - yh_signed_consents_2025-12-24
+ */
+export const cleanLocalStorageIfNeeded = (): void => {
+  if (typeof window === 'undefined' || !window.localStorage) return;
+
+  const today = getTodayString(); // YYYY-MM-DD
+  const lastCleanDate = window.localStorage.getItem(CLEAN_LAST_TIME_KEY);
+
+  // 如果已经在今天清理过，则直接返回
+  if (lastCleanDate === today) {
+    return;
+  }
+
+  const { localStorage } = window;
+  const keysToRemove: string[] = [];
+
+  for (let i = 0; i < localStorage.length; i++) {
+    const key = localStorage.key(i);
+    if (!key) continue;
+
+    // 匹配 yh_tongyishu_pdf_list_YYYY-MM-DD_xxx
+    const matchTongyishu = key.match(/^yh_tongyishu_pdf_list_(\d{4}-\d{2}-\d{2})_/);
+    if (matchTongyishu) {
+      const date = matchTongyishu[1];
+      if (date !== today) {
+        keysToRemove.push(key);
+      }
+      continue;
+    }
+
+    // 匹配 yh_exam_actions_YYYY-MM-DD_xxx
+    const matchExamActions = key.match(/^yh_exam_actions_(\d{4}-\d{2}-\d{2})_/);
+    if (matchExamActions) {
+      const date = matchExamActions[1];
+      if (date !== today) {
+        keysToRemove.push(key);
+      }
+      continue;
+    }
+
+    // 匹配 yh_signed_consents_YYYY-MM-DD
+    const matchSignedConsents = key.match(/^yh_signed_consents_(\d{4}-\d{2}-\d{2})$/);
+    if (matchSignedConsents) {
+      const date = matchSignedConsents[1];
+      if (date !== today) {
+        keysToRemove.push(key);
+      }
+      continue;
+    }
+  }
+
+  // 执行删除
+  keysToRemove.forEach((key) => {
+    try {
+      localStorage.removeItem(key);
+    } catch {
+      // 删除失败忽略
+    }
+  });
+
+  // 更新最后清理时间为今天
+  window.localStorage.setItem(CLEAN_LAST_TIME_KEY, today);
+};
+