diff --git a/exam-module-judgement/exam-module-judgement-biz/src/main/java/pc/exam/pp/module/judgement/service/TaskManager.java b/exam-module-judgement/exam-module-judgement-biz/src/main/java/pc/exam/pp/module/judgement/service/TaskManager.java
index b6e891b6..013ee6e3 100644
--- a/exam-module-judgement/exam-module-judgement-biz/src/main/java/pc/exam/pp/module/judgement/service/TaskManager.java
+++ b/exam-module-judgement/exam-module-judgement-biz/src/main/java/pc/exam/pp/module/judgement/service/TaskManager.java
@@ -28,6 +28,11 @@ public class TaskManager {
 
     /** 开始任务（每秒执行一次） */
     public void startTask(StuInTheExam stuInTheExam, StuTheExamInfo stuTheExamInfo, String token, AtomicInteger countdown, AtomicInteger counter) {
+        // 判断 token 的线程是否存在，存在则不进行任何动作
+        if (tasks.containsKey(token)) {
+            log.info("任务 {} 已存在，未重复启动", token);
+            return;
+        }
         tasks.computeIfAbsent(token, k -> {
             Runnable task = safe(() -> {
                 int current = counter.incrementAndGet();