diff --git a/backend/app/api/public.py b/backend/app/api/public.py
index 8c9650a06..255eb47e9 100644
--- a/backend/app/api/public.py
+++ b/backend/app/api/public.py
@@ -31,6 +31,7 @@ from app.services.web_auth_roles import (
     resolve_web_role_for_user,
     user_has_bound_roles,
 )
+from app.services.mp_webview_ticket import TICKET_TTL_SEC, consume_ticket, issue_ticket
 from app.crud.crm.quote import view_by_share_code
 
 router = APIRouter(prefix="", tags=["公共接口"])
@@ -207,6 +208,79 @@ def refresh_token(body: dict, db: Session = Depends(get_db)):
         return error_response(401, "refreshToken已过期")
 
 
+@router.post("/web/auth/mp-webview-ticket", response_model=dict)
+def mp_webview_ticket(request: Request, db: Session = Depends(get_db)):
+    """小程序内嵌 WebView：签发一次性短时 ticket（需 Bearer）。"""
+    authorization = request.headers.get("Authorization", "")
+    if not authorization.startswith("Bearer "):
+        return error_response(401, "未授权")
+    token = authorization.replace("Bearer ", "").strip()
+    try:
+        current_user = get_current_user_by_token(token=token, db=db)
+        payload = decode_token(token)
+    except HTTPException:
+        return error_response(401, "Token无效或已过期")
+    session_id = str(payload.get("sid") or "").strip()
+    if not session_id:
+        return error_response(401, "Token无效或已过期")
+    try:
+        ticket = issue_ticket(
+            user_id=str(current_user.get("user_id") or ""),
+            session_id=session_id,
+            refresh_jti=str(payload.get("jti") or ""),
+        )
+    except RuntimeError:
+        return error_response(503, "暂时无法打开内嵌页，请稍后重试")
+    return success_response({"ticket": ticket, "expiresIn": TICKET_TTL_SEC})
+
+
+@router.post("/web/auth/mp-webview-exchange", response_model=dict)
+def mp_webview_exchange(body: dict, db: Session = Depends(get_db)):
+    """小程序内嵌 WebView：用 ticket 兑换 Web JWT（不吊销原 refresh）。"""
+    ticket = str((body or {}).get("ticket") or "").strip()
+    if not ticket:
+        return error_response(400, "ticket不能为空")
+    try:
+        data = consume_ticket(ticket)
+    except RuntimeError:
+        return error_response(503, "暂时无法打开内嵌页，请稍后重试")
+    if not data:
+        return error_response(401, "ticket无效或已过期")
+    user_id = str(data.get("userId") or "").strip()
+    session_id = str(data.get("sessionId") or "").strip()
+    if not user_id or not session_id:
+        return error_response(401, "ticket无效或已过期")
+    if not is_session_valid(session_id):
+        return error_response(401, "登录已失效，请重新登录")
+    user = user_crud.get(db, user_id)
+    if not user or getattr(user, "del_flag", 0) != 0:
+        return error_response(401, "用户不存在或已删除")
+    if user.status != "1":
+        return error_response(403, "账号已被停用，请联系管理员")
+    web_role = resolve_web_role_for_user(db, user.id, user.tenant_no)
+    access_jti = generate_uuid()
+    refresh_jti = generate_uuid()
+    access_token = create_access_token(
+        data=_jwt_user_payload(user, web_role),
+        session_id=session_id,
+        token_jti=access_jti,
+    )
+    refresh_token_val = create_refresh_token(
+        data={"sub": user.id, "username": user.user_no, "role": web_role},
+        session_id=session_id,
+        refresh_jti=refresh_jti,
+    )
+    store_refresh_token(refresh_jti=refresh_jti, user_id=user.id)
+    return success_response(
+        {
+            "token": access_token,
+            "refreshToken": refresh_token_val,
+            "expiresIn": settings.ACCESS_TOKEN_EXPIRE_MINUTES * 60,
+            "userInfo": _build_user_info_payload(user, web_role),
+        }
+    )
+
+
 @router.post("/web/auth/logout", response_model=dict)
 def logout(request: Request):
     """登出：吊销 Redis 会话（若已配置 REDIS_HOST）。无 Token 或已失效时仍返回成功（幂等）。"""
diff --git a/backend/app/core/config.py b/backend/app/core/config.py
index 00b92bd5f..6112a25e3 100644
--- a/backend/app/core/config.py
+++ b/backend/app/core/config.py
@@ -160,6 +160,7 @@ class Settings(BaseSettings):
         "/api/web/auth/login-rsa-public-key,"
         "/api/web/auth/login,"
         "/api/web/auth/refresh-token,"
+        "/api/web/auth/mp-webview-exchange,"
         "/api/web/admin/attachment/upload,"
         "/api/web/admin/products/upload-image,"
         "/api/web/admin/categories/upload-image,"
diff --git a/backend/tests/test_mp_webview_auth_api.py b/backend/tests/test_mp_webview_auth_api.py
new file mode 100644
index 000000000..d40e45bdd
--- /dev/null
+++ b/backend/tests/test_mp_webview_auth_api.py
@@ -0,0 +1,22 @@
+"""小程序 WebView ticket 签发 / 兑换 HTTP 接口。"""
+from fastapi.testclient import TestClient
+
+from app.main import app
+
+client = TestClient(app)
+
+
+def test_mp_webview_ticket_requires_bearer():
+    resp = client.post("/api/web/auth/mp-webview-ticket")
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body["code"] == 401
+    assert body["message"] == "未授权"
+
+
+def test_mp_webview_exchange_requires_ticket():
+    resp = client.post("/api/web/auth/mp-webview-exchange", json={})
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body["code"] == 400
+    assert body["message"] == "ticket不能为空"