diff --git a/yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/vo/instance/BpmApprovalDetailRespVO.java b/yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/vo/instance/BpmApprovalDetailRespVO.java
index 38c2bc1013..0a785b10f4 100644
--- a/yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/vo/instance/BpmApprovalDetailRespVO.java
+++ b/yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/controller/admin/task/vo/instance/BpmApprovalDetailRespVO.java
@@ -73,7 +73,7 @@ public class BpmApprovalDetailRespVO {
         private List<UserSimpleBaseVO> candidateUsers; // 只包含未生成 ApprovalTaskInfo 的用户列表
 
         @Schema(description = "流程编号", example = "8761d8e0-0922-11f0-bd37-00ff1db677bf")
-        private String processInstanceId; // 当且仅当，该节点是子流程节点时，才会有值（CallActivity 的 processInstanceId 字段）
+        private String processInstanceId; // 当且仅当，该节点是子流程节点时，才会有值（CallActivity 的 calledProcessInstanceId 字段）
 
     }
 
diff --git a/yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmProcessInstanceServiceImpl.java b/yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmProcessInstanceServiceImpl.java
index a42a3ecd4b..d056e4dbd8 100644
--- a/yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmProcessInstanceServiceImpl.java
+++ b/yudao-module-bpm/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmProcessInstanceServiceImpl.java
@@ -244,7 +244,7 @@ public class BpmProcessInstanceServiceImpl implements BpmProcessInstanceService
         if (historicProcessInstance == null) {
             throw exception(ErrorCodeConstants.PROCESS_INSTANCE_NOT_EXISTS);
         }
-        // 1.3 校验BpmnModel
+        // 1.3 校验 BpmnModel
         BpmnModel bpmnModel = processDefinitionService.getProcessDefinitionBpmnModel(task.getProcessDefinitionId());
         if (bpmnModel == null) {
             return null;
@@ -449,7 +449,7 @@ public class BpmProcessInstanceServiceImpl implements BpmProcessInstanceService
                         .setNodeType(BpmSimpleModelNodeTypeEnum.CHILD_PROCESS.getType()).setStatus(processInstanceStatus)
                         .setStartTime(DateUtils.of(activity.getStartTime()))
                         .setEndTime(DateUtils.of(activity.getEndTime()))
-                        .setProcessInstanceId(activity.getProcessInstanceId());
+                        .setProcessInstanceId(activity.getCalledProcessInstanceId());
                 approvalNodes.add(callActivity);
             }
         });
@@ -521,7 +521,7 @@ public class BpmProcessInstanceServiceImpl implements BpmProcessInstanceService
                 activityNode.setCandidateUserIds(CollUtil.sub(candidateUserIds, index + 1, candidateUserIds.size()));
             }
             if (BpmSimpleModelNodeTypeEnum.CHILD_PROCESS.getType().equals(activityNode.getNodeType())) {
-                activityNode.setProcessInstanceId(firstActivity.getProcessInstanceId());
+                activityNode.setProcessInstanceId(firstActivity.getCalledProcessInstanceId());
             }
             return activityNode;
         });