diff --git a/src/main/java/com/ydw/bat/wkflow/business_activiti/task/TodoTaskController.java b/src/main/java/com/ydw/bat/wkflow/business_activiti/task/TodoTaskController.java
index bf106671..e1691b9c 100644
--- a/src/main/java/com/ydw/bat/wkflow/business_activiti/task/TodoTaskController.java
+++ b/src/main/java/com/ydw/bat/wkflow/business_activiti/task/TodoTaskController.java
@@ -3318,4 +3318,14 @@ public class TodoTaskController extends BaseAction {
         return processNew;
 
     }
+
+    @ApiOperation(value = "根据流程实例ID查询流程编号")
+    @GetMapping("/getProcessNumByPrcId")
+    Wrapper<String> getProcessNumByPrcId(@RequestParam("prcId") String prcId) {
+        String processNum = iBusProcessNameService.getProcessNumByPrcId(prcId);
+        if (StringUtils.isBlank(processNum)) {
+            return WrapMapper.error("未找到流程编号");
+        }
+        return WrapMapper.ok(processNum);
+    }
 }
diff --git a/src/main/java/com/ydw/bat/wkflow/business_main/datas/service/IBusProcessNameService.java b/src/main/java/com/ydw/bat/wkflow/business_main/datas/service/IBusProcessNameService.java
index e599d138..f24d787b 100644
--- a/src/main/java/com/ydw/bat/wkflow/business_main/datas/service/IBusProcessNameService.java
+++ b/src/main/java/com/ydw/bat/wkflow/business_main/datas/service/IBusProcessNameService.java
@@ -26,4 +26,6 @@ public interface IBusProcessNameService extends IService<BusProcessName> {
     String delDB(List<String> id);
 
     BusProcessName selectById(String id);
+
+    String getProcessNumByPrcId(String prcId);
 }
diff --git a/src/main/java/com/ydw/bat/wkflow/business_main/datas/service/impl/BusProcessNameServiceImpl.java b/src/main/java/com/ydw/bat/wkflow/business_main/datas/service/impl/BusProcessNameServiceImpl.java
index 9943b9f3..55a4e34b 100644
--- a/src/main/java/com/ydw/bat/wkflow/business_main/datas/service/impl/BusProcessNameServiceImpl.java
+++ b/src/main/java/com/ydw/bat/wkflow/business_main/datas/service/impl/BusProcessNameServiceImpl.java
@@ -1,5 +1,6 @@
 package com.ydw.bat.wkflow.business_main.datas.service.impl;
 
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.ydw.bat.wkflow.business_activiti.dto.TaskCommonQuery;
 import com.ydw.bat.wkflow.business_main.datas.entity.BusProcessName;
 import com.ydw.bat.wkflow.business_main.datas.mapper.BusProcessNameMapper;
@@ -49,4 +50,15 @@ public class BusProcessNameServiceImpl extends ServiceImpl<BusProcessNameMapper,
         return busProcessNameMapper.selectById(id);
     }
 
+    @Override
+    public String getProcessNumByPrcId(String prcId) {
+        LambdaQueryWrapper<BusProcessName> wrapper = new LambdaQueryWrapper<>();
+        wrapper.eq(BusProcessName::getPrcId,prcId);
+        List<BusProcessName> busProcessNameList = list(wrapper);
+        if (busProcessNameList.size()>0){
+            return busProcessNameList.get(0).getPrcNum();
+        } else {
+            return null;
+        }
+    }
 }