diff --git a/packages/vjudge/src/fetch.ts b/packages/vjudge/src/fetch.ts
index 02c968b9..ca68bc97 100644
--- a/packages/vjudge/src/fetch.ts
+++ b/packages/vjudge/src/fetch.ts
@@ -47,4 +47,9 @@ export class BasicFetcher {
         if (this.fetchOptions.post?.headers) req = req.set(this.fetchOptions.post.headers);
         return this.account.proxy ? req.proxy(this.account.proxy) : req;
     }
+
+    setCookie(cookie: string | string[]) {
+        if (typeof cookie === 'string') this.cookie = [cookie];
+        else this.cookie = cookie;
+    }
 }
diff --git a/packages/vjudge/src/providers/codeforces.ts b/packages/vjudge/src/providers/codeforces.ts
index 0f143e82..251accba 100644
--- a/packages/vjudge/src/providers/codeforces.ts
+++ b/packages/vjudge/src/providers/codeforces.ts
@@ -126,7 +126,7 @@ export default class CodeforcesProvider extends BasicFetcher implements IBasicPr
         const cookie = res.header['set-cookie'];
         if (cookie) {
             await this.save({ cookie });
-            this.cookie = cookie;
+            this.setCookie(cookie);
         }
         if (await this.loggedIn) {
             logger.success('Logged in');
diff --git a/packages/vjudge/src/providers/luogu.ts b/packages/vjudge/src/providers/luogu.ts
index 05543637..77eae8ac 100644
--- a/packages/vjudge/src/providers/luogu.ts
+++ b/packages/vjudge/src/providers/luogu.ts
@@ -41,7 +41,10 @@ export default class LuoguProvider extends BasicFetcher implements IBasicProvide
                 },
             },
         });
-        setInterval(() => this.getCsrfToken('/user/setting'), 5 * 60 * 1000);
+        setInterval(() => {
+            this.ensureLogin();
+            this.getCsrfToken('/user/setting');
+        }, 5 * 60 * 1000);
     }
 
     async getCsrfToken(url: string) {
@@ -60,7 +63,17 @@ export default class LuoguProvider extends BasicFetcher implements IBasicProvide
             return true;
         }
         logger.info('retry login');
-        // TODO login;
+        const res = await this.post(`/api/auth/userPassLogin${this.account.query || ''}`)
+            .set('referer', 'https://www.luogu.com.cn/user/setting')
+            .send({
+                username: this.account.handle,
+                password: this.account.password,
+            });
+        if (res.headers['set-cookie']) this.setCookie(res.headers['set-cookie']);
+        if (await this.loggedIn) {
+            await this.getCsrfToken('/user/setting');
+            return true;
+        }
         return false;
     }