diff --git a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/controller/ProjectController.java b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/controller/ProjectController.java
index d31c5cc..3ad20ba 100644
--- a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/controller/ProjectController.java
+++ b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/controller/ProjectController.java
@@ -82,7 +82,6 @@ public class ProjectController {
         return ResponseMap.ofSuccess("操作成功");
     }
 
-    //TODO:该业务尚未实现
     @SneakyThrows
     @PutMapping("/{projectId}")
     public ResponseMap updateProject(
@@ -90,9 +89,10 @@ public class ProjectController {
             @PathVariable Integer projectId,
             @RequestBody Project project
     ) {
-        //project.setProjectId(projectId);
-        //projectService.updateById(project);
-        //return ResponseMap.ofSuccess("操作成功");
-        return null;
+        project.setProjectId(projectId);
+        if (!projectService.checkOpenStatus(projectId))
+            throw new BadRequestException("项目未开放");
+        projectService.updateProject(token, project);
+        return ResponseMap.ofSuccess("操作成功");
     }
 }
diff --git a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Project.java b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Project.java
index 73dca01..da09f17 100644
--- a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Project.java
+++ b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/entity/Project.java
@@ -10,6 +10,7 @@ import lombok.Data;
 import java.math.BigDecimal;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.util.Objects;
 
 /**
  * @author 阳勇权
@@ -20,7 +21,6 @@ public class Project {
     @TableId(type = IdType.AUTO)
     private Integer projectId;
     private String projectName;
-    //TODO: 时间线顺序判断
     private LocalDate projectStartDate;
     private LocalDate projectOnlineDate;
     private LocalDate projectFirstTestDate;
@@ -47,14 +47,39 @@ public class Project {
     private LocalDateTime projectCreatedTime;
     private LocalDate projectClosedDate;
 
-    Boolean checkProjectDate() {
-        if(!TimeUtils.validateTimeLine(projectStartDate, projectFirstTestDate, projectClosedDate, projectEndDate)) {
+    public Boolean checkProjectDate() {
+        if (!TimeUtils.validateTimeLine(projectStartDate, projectFirstTestDate, projectClosedDate, projectEndDate)) {
             return false;
         }
-        if(!TimeUtils.validateTimeLine(projectStartDate, projectOnlineDate)) {
+        if (!TimeUtils.validateTimeLine(projectStartDate, projectOnlineDate)) {
             return false;
         }
         return true;
     }
 
+    public Boolean checkModification(Project rawProject) {
+        if (!this.checkProjectDate())
+            return false;
+        if (!Objects.equals(this.getProjectId(), rawProject.getProjectId()))
+            return false;
+        if (!Objects.equals(this.getProjectCreator(), rawProject.getProjectCreator()))
+            return false;
+        if (!Objects.equals(this.getProjectCreatedTime(), rawProject.getProjectCreatedTime()))
+            return false;
+        if (!Objects.equals(this.getProjectName(), rawProject.getProjectName()))
+            return false;
+        if (!Objects.equals(this.getProjectClassId(), rawProject.getProjectClassId()))
+            return false;
+        if (!Objects.equals(this.getProjectSubclassId(), rawProject.getProjectSubclassId()))
+            return false;
+        if (!Objects.equals(this.getProjectDepartment(), rawProject.getProjectDepartment()))
+            return false;
+        if (!Objects.equals(this.getProjectCompany(), rawProject.getProjectCompany()))
+            return false;
+        if (!Objects.equals(this.getProjectArea(), rawProject.getProjectArea()))
+            return false;
+        this.setDeleted(false);
+        this.setCompleted(false);
+        return true;
+    }
 }
diff --git a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/IProjectService.java b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/IProjectService.java
index 920aaec..6849d4b 100644
--- a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/IProjectService.java
+++ b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/IProjectService.java
@@ -24,4 +24,6 @@ public interface IProjectService extends IService<Project> {
     Boolean createProject(String token, Project project) throws BadRequestException;
 
     Boolean checkOpenStatus(Integer projectId);
+
+    Boolean updateProject(String token, Project project) throws BadRequestException;
 }
diff --git a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/ProjectServiceImpl.java b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/ProjectServiceImpl.java
index 2b02783..50153cb 100644
--- a/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/ProjectServiceImpl.java
+++ b/src/main/java/cn/edu/hfut/rmdjzz/projectmanagement/service/impl/ProjectServiceImpl.java
@@ -16,6 +16,7 @@ import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.math.BigDecimal;
 import java.time.LocalDate;
 import java.util.Map;
 import java.util.Objects;
@@ -76,8 +77,7 @@ public class ProjectServiceImpl extends ServiceImpl<ProjectMapper, Project> impl
         if (project.getExpectedCompletion() == null) {
             project.setExpectedCompletion((short) 100);
         } else if (project.getExpectedCompletion() < 0 || project.getExpectedCompletion() > 100 ||
-                project.getProjectStartDate() == null || project.getProjectEndDate() == null ||
-                project.getProjectStartDate().isAfter(project.getProjectEndDate())
+                !project.checkProjectDate() || project.getProjectManMonth().compareTo(new BigDecimal("0")) == -1
         ) {
             throw new BadRequestException("参数错误");
         }
@@ -100,4 +100,22 @@ public class ProjectServiceImpl extends ServiceImpl<ProjectMapper, Project> impl
         Project project = baseMapper.selectOne(Wrappers.<Project>lambdaQuery().eq(Project::getProjectId, projectId));
         return project != null && !project.getCompleted();
     }
+
+    public Boolean updateProject(String token, Project project) throws BadRequestException {
+        Integer staffId = TokenUtils.getStaffId(token);
+        if (!staffId.equals(project.getProjectCreator())) {
+            throw new BadRequestException("无权操作");
+        }
+        Project rawProject = baseMapper.selectOne(Wrappers.<Project>lambdaQuery().eq(Project::getProjectId, project.getProjectId()));
+        if (!project.checkModification(rawProject)) {
+            throw new BadRequestException("参数错误");
+        }
+        try {
+            if (baseMapper.updateById(project) == 1)
+                return true;
+            throw new BadRequestException("修改失败");
+        } catch (Exception e) {
+            throw new BadRequestException("修改失败");
+        }
+    }
 }