diff --git a/src/main/java/github/benjamin/equipreservebackend/controller/ReservationController.java b/src/main/java/github/benjamin/equipreservebackend/controller/ReservationController.java
index 4669875..dbdf9fe 100644
--- a/src/main/java/github/benjamin/equipreservebackend/controller/ReservationController.java
+++ b/src/main/java/github/benjamin/equipreservebackend/controller/ReservationController.java
@@ -2,11 +2,9 @@ package github.benjamin.equipreservebackend.controller;
 
 import com.alibaba.excel.EasyExcel;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
-import github.benjamin.equipreservebackend.constant.ReservationStatus;
 import github.benjamin.equipreservebackend.entity.Reservation;
 import github.benjamin.equipreservebackend.response.ResponseResult;
 import github.benjamin.equipreservebackend.service.ReservationService;
-import github.benjamin.equipreservebackend.vo.DeviceStatsVO;
 import github.benjamin.equipreservebackend.vo.ReservationStatsVO;
 import github.benjamin.equipreservebackend.vo.ReservationVO;
 import github.benjamin.equipreservebackend.vo.UserReservationVO;
@@ -22,6 +20,7 @@ import java.nio.charset.StandardCharsets;
 import java.time.LocalDate;
 import java.time.format.DateTimeFormatter;
 import java.util.List;
+import java.util.Map;
 
 @RestController
 @RequestMapping("/reservation")
@@ -83,4 +82,12 @@ public class ReservationController {
                 .doWrite(data);
     }
 
+    @PreAuthorize("hasRole('DEVICE_ADMIN')")
+    @PostMapping("/endTime/{reservationId}")
+    public ResponseResult<?> updateEndTime(@PathVariable Long reservationId,
+                                           @RequestBody Map<String, String> body) {
+        LocalDate endTime = LocalDate.parse(body.get("endTime"));
+        reservationService.updateEndTime(reservationId, endTime);
+        return ResponseResult.success();
+    }
 }
diff --git a/src/main/java/github/benjamin/equipreservebackend/service/ReservationService.java b/src/main/java/github/benjamin/equipreservebackend/service/ReservationService.java
index 280d3c6..0b00557 100644
--- a/src/main/java/github/benjamin/equipreservebackend/service/ReservationService.java
+++ b/src/main/java/github/benjamin/equipreservebackend/service/ReservationService.java
@@ -22,4 +22,6 @@ public interface ReservationService {
     List<ReservationStatsVO> getReservationStats(LocalDate start, LocalDate end);
 
     List<DeviceDetailStatsVO> getDeviceDetailStats(Long deviceId, LocalDate start, LocalDate end);
+
+    void updateEndTime(Long reservationId, LocalDate endTime);
 }
diff --git a/src/main/java/github/benjamin/equipreservebackend/service/impl/ReservationServiceImpl.java b/src/main/java/github/benjamin/equipreservebackend/service/impl/ReservationServiceImpl.java
index b4d0eba..f14bdbf 100644
--- a/src/main/java/github/benjamin/equipreservebackend/service/impl/ReservationServiceImpl.java
+++ b/src/main/java/github/benjamin/equipreservebackend/service/impl/ReservationServiceImpl.java
@@ -1,6 +1,7 @@
 package github.benjamin.equipreservebackend.service.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import github.benjamin.equipreservebackend.constant.ReservationStatus;
 import github.benjamin.equipreservebackend.entity.Device;
@@ -165,4 +166,11 @@ public class ReservationServiceImpl implements ReservationService {
                 .le(Reservation::getEndTime, end)
                 .orderByAsc(Reservation::getApplicantName, Reservation::getStartTime)).stream().map(DeviceDetailStatsVO::new).toList();
     }
+
+    @Override
+    public void updateEndTime(Long reservationId, LocalDate endTime) {
+        reservationMapper.update(new LambdaUpdateWrapper<Reservation>()
+                .eq(Reservation::getId, reservationId)
+                .set(Reservation::getEndTime, endTime));
+    }
 }
diff --git a/src/main/java/github/benjamin/equipreservebackend/vo/LeaderApprovalVO.java b/src/main/java/github/benjamin/equipreservebackend/vo/LeaderApprovalVO.java
index 7a21892..9ab34af 100644
--- a/src/main/java/github/benjamin/equipreservebackend/vo/LeaderApprovalVO.java
+++ b/src/main/java/github/benjamin/equipreservebackend/vo/LeaderApprovalVO.java
@@ -9,6 +9,8 @@ import java.time.LocalDate;
 @Data
 public class LeaderApprovalVO {
 
+    @JsonSerialize(using = ToStringSerializer.class)
+    private Long reservationId;
     @JsonSerialize(using = ToStringSerializer.class)
     private Long approvalId;
     private String applicantName;
diff --git a/src/main/resources/mapper/ApprovalMapper.xml b/src/main/resources/mapper/ApprovalMapper.xml
index a919672..a77cde2 100644
--- a/src/main/resources/mapper/ApprovalMapper.xml
+++ b/src/main/resources/mapper/ApprovalMapper.xml
@@ -5,7 +5,7 @@
 <mapper namespace="github.benjamin.equipreservebackend.mapper.ApprovalMapper">
 
     <select id="getApproval" resultType="github.benjamin.equipreservebackend.vo.LeaderApprovalVO">
-        SELECT a.id as approvalId, r.applicant_name, r.applicant_team, r.applicant_contact, d.name as deviceName, r.start_time, r.end_time, a.decision, r.status
+        SELECT r.id as reservation_id, a.id as approval_id, r.applicant_name, r.applicant_team, r.applicant_contact, d.name as deviceName, r.start_time, r.end_time, a.decision, r.status
         FROM approvals a
         LEFT JOIN reservations r ON a.reservation_id = r.id
         LEFT JOIN devices d ON r.device_id = d.id