diff --git a/ruoyi-oa/src/main/java/com/ruoyi/oa/controller/SysOaProjectController.java b/ruoyi-oa/src/main/java/com/ruoyi/oa/controller/SysOaProjectController.java
index cdb5883..e891482 100644
--- a/ruoyi-oa/src/main/java/com/ruoyi/oa/controller/SysOaProjectController.java
+++ b/ruoyi-oa/src/main/java/com/ruoyi/oa/controller/SysOaProjectController.java
@@ -279,4 +279,10 @@ public class SysOaProjectController extends BaseController {
         return toAjax(iSysOaProjectService.postponeProject(bo));
     }
 
+
+    @GetMapping("/maxCode/{prefix}")
+    public R<SysOaProjectVo> maxCode(@PathVariable String prefix) {
+        return R.ok(iSysOaProjectService.getMaxCode(prefix));
+    }
+
 }
\ No newline at end of file
diff --git a/ruoyi-oa/src/main/java/com/ruoyi/oa/mapper/SysOaProjectMapper.java b/ruoyi-oa/src/main/java/com/ruoyi/oa/mapper/SysOaProjectMapper.java
index 5183a6e..2a3fec6 100644
--- a/ruoyi-oa/src/main/java/com/ruoyi/oa/mapper/SysOaProjectMapper.java
+++ b/ruoyi-oa/src/main/java/com/ruoyi/oa/mapper/SysOaProjectMapper.java
@@ -91,4 +91,7 @@ public interface SysOaProjectMapper extends BaseMapperPlus<SysOaProjectMapper, S
     BigDecimal selectPrevAvgContractCount(@Param("start") Date start, @Param("end") Date end, @Param("tradeType") Long tradeType);
 
     BigDecimal selectPrevAvgExpiringCount(@Param("start") Date start, @Param("end") Date end, @Param("tradeType") Long tradeType);
+
+    SysOaProjectVo getMaxCodeProject(@Param("prefix") String prefix);
+
 }
diff --git a/ruoyi-oa/src/main/java/com/ruoyi/oa/service/ISysOaProjectService.java b/ruoyi-oa/src/main/java/com/ruoyi/oa/service/ISysOaProjectService.java
index ed524cb..aff454c 100644
--- a/ruoyi-oa/src/main/java/com/ruoyi/oa/service/ISysOaProjectService.java
+++ b/ruoyi-oa/src/main/java/com/ruoyi/oa/service/ISysOaProjectService.java
@@ -101,4 +101,6 @@ public interface ISysOaProjectService {
     List<ProjectActivityDTO> getProjectActivities();
 
     Boolean postponeProject(SysOaProject bo);
+
+    SysOaProjectVo getMaxCode(String prefix);
 }
diff --git a/ruoyi-oa/src/main/java/com/ruoyi/oa/service/impl/SysOaProjectServiceImpl.java b/ruoyi-oa/src/main/java/com/ruoyi/oa/service/impl/SysOaProjectServiceImpl.java
index 931e9a7..558080d 100644
--- a/ruoyi-oa/src/main/java/com/ruoyi/oa/service/impl/SysOaProjectServiceImpl.java
+++ b/ruoyi-oa/src/main/java/com/ruoyi/oa/service/impl/SysOaProjectServiceImpl.java
@@ -559,4 +559,9 @@ public class SysOaProjectServiceImpl implements ISysOaProjectService {
         return baseMapper.update(null, updateWrapper) > 0;
     }
 
+    @Override
+    public SysOaProjectVo getMaxCode(String prefix) {
+        return    baseMapper.getMaxCodeProject(prefix);
+    }
+
 }
diff --git a/ruoyi-oa/src/main/resources/mapper/oa/SysOaProjectMapper.xml b/ruoyi-oa/src/main/resources/mapper/oa/SysOaProjectMapper.xml
index a0253ff..76c3477 100644
--- a/ruoyi-oa/src/main/resources/mapper/oa/SysOaProjectMapper.xml
+++ b/ruoyi-oa/src/main/resources/mapper/oa/SysOaProjectMapper.xml
@@ -890,4 +890,14 @@
             ) AS finance_details ON p.project_id = finance_details.project_id
             ${ew.customSqlSegment}
     </select>
+
+
+    <select id="getMaxCodeProject" resultType="com.ruoyi.oa.domain.vo.SysOaProjectVo">
+        SELECT sop.project_id, project_name, project_num, project_code, project_type, address, funds, functionary, begin_time, finish_time, original_finish_time, delivery, guarantee, introduction, project_grade, project_status, contract_id, invoice_name, invoice_number, invoice_address, invoice_bank, accessory, bail, closure_files, signing_company, remark, create_by, create_time, update_by, update_time, is_postpone, postpone_reason, postpone_time, postpone_count, color, trade_type, pre_pay, customer_id, is_top
+        FROM sys_oa_project sop
+        WHERE project_code IS NOT NULL
+          AND project_code LIKE CONCAT(#{prefix}, '-%')
+        ORDER BY CAST(SUBSTRING(project_code, LOCATE('-', project_code) + 1) AS UNSIGNED) DESC
+        LIMIT 1;
+    </select>
 </mapper>