diff --git a/src/main.ts b/src/main.ts
index 6c009ad..d2eebed 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -72,12 +72,30 @@ router.beforeEach(async (to, from , next) => {
             }
         }
     }
-    // switched unionid
+    // switched unionid（URL 与当前会话不一致时）
     if (to.query.unionid && store.unionid !== to.query.unionid) {
-        cookie.set(HtyUnionIDToken, to.query.unionid);
+        const rawQ = to.query.unionid;
+        const qUnionStr = String(Array.isArray(rawQ) ? rawQ[0] : rawQ || '');
+        // 已登录且 URL 中的 unionid 与当前用户不同：多为带毒分享链接，剥离身份参数而非 logout
+        if (store.current.hty_id && qUnionStr) {
+            const cur = store.current as { union_id?: string };
+            const currentUnion = String(
+                cur.union_id != null && cur.union_id !== '' ? cur.union_id : store.unionid || ''
+            );
+            if (currentUnion && qUnionStr !== currentUnion) {
+                const nextQuery = { ...to.query } as Record<string, string | string[] | undefined | null>;
+                delete nextQuery.unionid;
+                delete nextQuery.openid;
+                delete nextQuery.status;
+                await router.replace({ path: to.path, query: nextQuery });
+                next();
+                return;
+            }
+        }
+        cookie.set(HtyUnionIDToken, qUnionStr);
         logout();
-        await login(to.query.toString())
-        next()
+        await login(qUnionStr);
+        next();
         return;
     }
     let {enabled, is_registered, roles, union_id} = store.current;
diff --git a/src/pages/index.vue b/src/pages/index.vue
index b6af953..276e8bd 100644
--- a/src/pages/index.vue
+++ b/src/pages/index.vue
@@ -50,6 +50,7 @@ import {
   showConfirmDialog,
 } from "vant";
 import { CurrentUserRole } from "~/utils";
+import { sanitizeMiniProgramWebViewPathForRouter } from "~/utils/wxMiniProgramWebViewShare";
 
 export default defineComponent({
   components: {
@@ -97,7 +98,8 @@ export default defineComponent({
 
       console.log("page_path...", page_path, decodeURIComponent(page_path))
       if (page_path) {
-        await router.push(decodeURIComponent(page_path))
+        const inner = sanitizeMiniProgramWebViewPathForRouter(decodeURIComponent(page_path))
+        await router.push(inner)
         return;
       }
 
diff --git a/src/utils/wxMiniProgramWebViewShare.ts b/src/utils/wxMiniProgramWebViewShare.ts
new file mode 100644
index 0000000..bd99233
--- /dev/null
+++ b/src/utils/wxMiniProgramWebViewShare.ts
@@ -0,0 +1,42 @@
+/**
+ * 小程序 WebView 分享 / page_path 里可能携带上一用户的 unionid、openid、status 等，
+ * 接收方打开后会导致串号或误登。从「路径 + 查询」字符串中剥离这些参数后再交给 vue-router。
+ */
+const WEBVIEW_IDENTITY_QUERY_KEYS = [
+  'unionid',
+  'openid',
+  'status',
+  'nickName',
+  'avatarUrl',
+  'ts',
+  'scene',
+] as const;
+
+export function sanitizeMiniProgramWebViewPathForRouter(decodedPathOrUrl: string): string {
+  const raw = decodedPathOrUrl.trim();
+  if (!raw || raw === '/') {
+    return '/';
+  }
+  let pathPart = raw;
+  let search = '';
+  const q = raw.indexOf('?');
+  if (q === 0) {
+    pathPart = '/';
+    search = raw.slice(1);
+  } else if (q > 0) {
+    pathPart = raw.slice(0, q) || '/';
+    search = raw.slice(q + 1);
+  }
+  if (!pathPart.startsWith('/')) {
+    pathPart = `/${pathPart}`;
+  }
+  if (!search) {
+    return pathPart;
+  }
+  const params = new URLSearchParams(search);
+  for (const key of WEBVIEW_IDENTITY_QUERY_KEYS) {
+    params.delete(key);
+  }
+  const rest = params.toString();
+  return rest ? `${pathPart}?${rest}` : pathPart;
+}
diff --git a/weapp/pages/index/index.js b/weapp/pages/index/index.js
index e50c42b..ff5b657 100644
--- a/weapp/pages/index/index.js
+++ b/weapp/pages/index/index.js
@@ -211,8 +211,29 @@ Page({
     onShareAppMessage({from, target, webViewUrl}) {
         log.info("share", [from, target, webViewUrl].join(" | "))
         let pathname = webViewUrl.replace(app.globalData.server, '');
-        if (pathname !== '/') {
-          pathname = encodeURIComponent(pathname)
+        // 分享勿带 WebView 入口里的 unionid/openid/status 等，避免接收方串号
+        if (pathname && pathname !== '/') {
+          try {
+            const q = pathname.indexOf('?')
+            let base = pathname
+            let search = ''
+            if (q === 0) {
+              base = '/'
+              search = pathname.slice(1)
+            } else if (q > 0) {
+              base = pathname.slice(0, q) || '/'
+              search = pathname.slice(q + 1)
+            }
+            if (search) {
+              const sp = new URLSearchParams(search)
+              ;['unionid', 'openid', 'status', 'nickName', 'avatarUrl', 'ts', 'scene'].forEach((k) => sp.delete(k))
+              const rest = sp.toString()
+              pathname = rest ? `${base}?${rest}` : (base || '/')
+            }
+          } catch (e) {
+            log.info('share strip query skip', e)
+          }
+          pathname = pathname === '/' ? '/' : encodeURIComponent(pathname)
         }
         const promise = new Promise(resolve => {
           setTimeout(() => {