diff --git a/eagle-oj-web/src/main/java/com/eagleoj/web/controller/ProblemController.java b/eagle-oj-web/src/main/java/com/eagleoj/web/controller/ProblemController.java
index cab93e5..699a893 100644
--- a/eagle-oj-web/src/main/java/com/eagleoj/web/controller/ProblemController.java
+++ b/eagle-oj-web/src/main/java/com/eagleoj/web/controller/ProblemController.java
@@ -11,6 +11,7 @@
 import com.eagleoj.web.data.status.RoleStatus;
 import com.eagleoj.web.service.ProblemModeratorService;
 import io.swagger.annotations.ApiOperation;
+import org.apache.shiro.SecurityUtils;
 import org.apache.shiro.authz.annotation.Logical;
 import org.apache.shiro.authz.annotation.RequiresAuthentication;
 import com.eagleoj.web.entity.*;
@@ -47,6 +48,16 @@ public class ProblemController {
     @Autowired
     private TestCasesService testCasesService;
 
+    @ApiOperation("随机获取一个题目ID")
+    @GetMapping("/random")
+    public ResponseEntity getRandomProblem() {
+        if (SecurityUtils.getSubject().isAuthenticated()) {
+            return new ResponseEntity(problemService.getRandomPid(SessionHelper.get().getUid()));
+        } else {
+            return new ResponseEntity(problemService.getRandomPid(null));
+        }
+    }
+
 
     @ApiOperation("获取指定题目的信息")
     @GetMapping("/{pid}")
diff --git a/eagle-oj-web/src/main/java/com/eagleoj/web/dao/ProblemMapper.java b/eagle-oj-web/src/main/java/com/eagleoj/web/dao/ProblemMapper.java
index bd9f9a7..cd72b4b 100644
--- a/eagle-oj-web/src/main/java/com/eagleoj/web/dao/ProblemMapper.java
+++ b/eagle-oj-web/src/main/java/com/eagleoj/web/dao/ProblemMapper.java
@@ -18,6 +18,8 @@ public interface ProblemMapper {
 
     int count();
 
+    int getRandomPid(Integer uid);
+
     ProblemEntity getByPid(int pid);
 
     List<Map<String, Object>> listProblemTagsByPid(int pid);
diff --git a/eagle-oj-web/src/main/java/com/eagleoj/web/service/ProblemService.java b/eagle-oj-web/src/main/java/com/eagleoj/web/service/ProblemService.java
index 7e19cdb..10d67e1 100644
--- a/eagle-oj-web/src/main/java/com/eagleoj/web/service/ProblemService.java
+++ b/eagle-oj-web/src/main/java/com/eagleoj/web/service/ProblemService.java
@@ -17,6 +17,8 @@ int save(JSONArray tags, int owner, String title, JSONObject description, JSONOb
 
     int countProblems();
 
+    int getRandomPid(Integer uid);
+
     void deleteProblem(int pid);
 
     void updateProblem(int pid, JSONArray tags, ProblemEntity problemEntity);
diff --git a/eagle-oj-web/src/main/java/com/eagleoj/web/service/impl/ProblemServiceImpl.java b/eagle-oj-web/src/main/java/com/eagleoj/web/service/impl/ProblemServiceImpl.java
index 760b420..4b69f77 100644
--- a/eagle-oj-web/src/main/java/com/eagleoj/web/service/impl/ProblemServiceImpl.java
+++ b/eagle-oj-web/src/main/java/com/eagleoj/web/service/impl/ProblemServiceImpl.java
@@ -97,6 +97,11 @@ public int countProblems() {
         return problemMapper.count();
     }
 
+    @Override
+    public int getRandomPid(Integer uid) {
+        return problemMapper.getRandomPid(uid);
+    }
+
     @Transactional
     @Override
     public void deleteProblem(int pid) {
diff --git a/eagle-oj-web/src/main/resources/mapping/ProblemMapper.xml b/eagle-oj-web/src/main/resources/mapping/ProblemMapper.xml
index c93fdf3..c731d0a 100644
--- a/eagle-oj-web/src/main/resources/mapping/ProblemMapper.xml
+++ b/eagle-oj-web/src/main/resources/mapping/ProblemMapper.xml
@@ -14,6 +14,18 @@
         SELECT count(*) FROM problem
     </select>
 
+    <select id="getRandomPid" resultType="Integer">
+        SELECT problem.pid FROM problem
+        <if test="uid != null">
+            LEFT JOIN problem_user ON problem.pid=problem_user.pid
+        </if>
+        WHERE problem.status=2
+        <if test="uid != null">
+            AND problem_user.status!='AC'
+        </if>
+        ORDER BY rand() LIMIT 1
+    </select>
+
     <select id="getByPid" resultMap="problemResultMap">
         SELECT * from `problem` WHERE `pid` = #{pid}
     </select>