diff --git a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Task.java b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Task.java
index a745a5b..a82c2b0 100644
--- a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Task.java
+++ b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Task.java
@@ -1,5 +1,6 @@
 package cn.edu.hfut.rmdjzz.projectmanagement.entity;
 
+import cn.edu.hfut.rmdjzz.projectmanagement.service.IProjectGroupService;
 import cn.edu.hfut.rmdjzz.projectmanagement.utils.BeanUtils;
 import com.baomidou.mybatisplus.annotation.IdType;
 import com.baomidou.mybatisplus.annotation.TableField;
@@ -8,6 +9,7 @@ import com.baomidou.mybatisplus.annotation.TableLogic;
 import com.baomidou.mybatisplus.extension.handlers.JacksonTypeHandler;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Data;
+import org.springframework.beans.factory.annotation.Autowired;
 
 import java.time.LocalDateTime;
 import java.util.Map;
@@ -19,7 +21,8 @@ import java.util.Objects;
  */
 @Data
 public class Task {
-
+    @Autowired
+    private IProjectGroupService projectGroupService;
     public static final String ATTACH_DEMAND_SOURCE = "demandSource";
     public static final String ATTACH_ESTIMATED_MAN_HOURS = "estimatedManHours";
     public static final String ATTACH_SEVERITY = "severity";
@@ -100,7 +103,7 @@ public class Task {
             return false;
         if (father.getTaskId() == 0)
             return true;
-        if(!father.getTaskStatus().equals(STATUS_WAITING)&&!father.getTaskStatus().equals(STATUS_PROCESSING))
+        if (!father.getTaskStatus().equals(STATUS_WAITING) && !father.getTaskStatus().equals(STATUS_PROCESSING))
             return false;
         if (this.getTaskType().equals(TYPE_DEFECT)) {
             return father.getTaskType().equals(TYPE_DEMAND);
@@ -113,6 +116,8 @@ public class Task {
     }
 
     public Boolean checkModification(Task rawTask) {
+        if (projectGroupService.getProjectAccessLevel(this.getTaskHolderId(), 3, this.getTaskProjectId()) == 0)
+            return false;
         if (rawTask.getTaskStatus().equals(STATUS_COMPLETED) || rawTask.getTaskStatus().equals(STATUS_CLOSED))
             return false;
         if (!rawTask.getTaskStatus().equals(STATUS_WAITING) && this.getTaskStatus().equals(STATUS_WAITING))