diff --git a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/util/BpmnModelUtils.java b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/util/BpmnModelUtils.java
index c471826306..2ec26b407e 100644
--- a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/util/BpmnModelUtils.java
+++ b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/util/BpmnModelUtils.java
@@ -908,12 +908,13 @@ public class BpmnModelUtils {
      */
     private static SequenceFlow findMatchSequenceFlowByExclusiveGateway(Gateway gateway, Map<String, Object> variables) {
         // TODO 表单无可编辑字段时variables为空，流程走向会出现问题，比如流程审批过程中无需要修改的字段值，
+        // TODO @小北：是不是还是保证，编辑的时候，如果计算下一个节点，还是 variables 是完整体？而不是空的！！！（可以微信讨论下）
         SequenceFlow matchSequenceFlow;
-        if (CollUtil.isNotEmpty(variables)){
+        if (CollUtil.isNotEmpty(variables)) {
              matchSequenceFlow = CollUtil.findOne(gateway.getOutgoingFlows(),
                     flow -> ObjUtil.notEqual(gateway.getDefaultFlow(), flow.getId())
                             && (evalConditionExpress(variables, flow.getConditionExpression())));
-        }else {
+        } else {
             matchSequenceFlow = CollUtil.findOne(gateway.getOutgoingFlows(),
                     flow -> ObjUtil.notEqual(gateway.getDefaultFlow(), flow.getId()));
         }
diff --git a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/util/FlowableUtils.java b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/util/FlowableUtils.java
index fe83495e35..67c24bb9f4 100644
--- a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/util/FlowableUtils.java
+++ b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/framework/flowable/core/util/FlowableUtils.java
@@ -194,7 +194,7 @@ public class FlowableUtils {
     @SuppressWarnings("unchecked")
     public static Map<String, List<Long>> getStartUserSelectAssignees(Map<String, Object> processVariables) {
         if (processVariables == null) {
-            return null;
+            return new HashMap<>();
         }
         return (Map<String, List<Long>>) processVariables.get(
                 BpmnVariableConstants.PROCESS_INSTANCE_VARIABLE_START_USER_SELECT_ASSIGNEES);
@@ -219,7 +219,7 @@ public class FlowableUtils {
     @SuppressWarnings("unchecked")
     public static Map<String, List<Long>> getApproveUserSelectAssignees(Map<String, Object> processVariables) {
         if (processVariables == null) {
-            return null;
+            return new HashMap<>();
         }
         return (Map<String, List<Long>>) processVariables.get(
                 BpmnVariableConstants.PROCESS_INSTANCE_VARIABLE_APPROVE_USER_SELECT_ASSIGNEES);
diff --git a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/definition/BpmModelServiceImpl.java b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/definition/BpmModelServiceImpl.java
index 7a737d953a..6f3162683f 100644
--- a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/definition/BpmModelServiceImpl.java
+++ b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/definition/BpmModelServiceImpl.java
@@ -231,7 +231,7 @@ public class BpmModelServiceImpl implements BpmModelService {
         repositoryService.saveModel(model);
     }
 
-    private void validateBpmnXml(byte[] bpmnBytes, int type) {
+    private void validateBpmnXml(byte[] bpmnBytes, Integer type) {
         BpmnModel bpmnModel = BpmnModelUtils.getBpmnModel(bpmnBytes);
         if (bpmnModel == null) {
             throw exception(MODEL_NOT_EXISTS);
@@ -248,6 +248,7 @@ public class BpmModelServiceImpl implements BpmModelService {
                 throw exception(MODEL_DEPLOY_FAIL_BPMN_USER_TASK_NAME_NOT_EXISTS, userTask.getId());
             }
         });
+        // TODO @小北：是不是可以 UserTask firUserTask = CollUtil.get(userTasks, BpmModelTypeEnum.BPMN.getType().equals(type) ? 0 : 1)；然后，最好判空。。。极端情况下，没 usertask ，哈哈哈哈。
         // 3. 校验第一个用户任务节点的规则类型是否为“审批人自选”
         Map<Integer, UserTask> userTaskMap = new HashMap<>();
         // BPMN 设计器，校验第一个用户任务节点
diff --git a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskServiceImpl.java b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskServiceImpl.java
index eab70f921b..f96d0cb392 100644
--- a/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskServiceImpl.java
+++ b/yudao-module-bpm/yudao-module-bpm-biz/src/main/java/cn/iocoder/yudao/module/bpm/service/task/BpmTaskServiceImpl.java
@@ -557,12 +557,11 @@ public class BpmTaskServiceImpl implements BpmTaskService {
         // 2.2 添加评论
         taskService.addComment(task.getId(), task.getProcessInstanceId(), BpmCommentTypeEnum.APPROVE.getType(),
                 BpmCommentTypeEnum.APPROVE.formatComment(reqVO.getReason()));
-        // 2.3 调用 BPM complete 去完成任务
-        // 校验并处理 APPROVE_USER_SELECT 当前审批人，选择下一节点审批人的逻辑
+        // 2.3 校验并处理 APPROVE_USER_SELECT 当前审批人，选择下一节点审批人的逻辑
         Map<String, Object> variables = validateAndSetNextAssignees(task.getTaskDefinitionKey(), reqVO.getVariables(),
                 bpmnModel, reqVO.getNextAssignees(), instance);
-        // 完成任务
         runtimeService.setVariables(task.getProcessInstanceId(), variables);
+        // 2.4 调用 BPM complete 去完成任务
         taskService.complete(task.getId(), variables, true);
 
         // 【加签专属】处理加签任务
@@ -587,10 +586,10 @@ public class BpmTaskServiceImpl implements BpmTaskService {
         // 1. 获取下一个将要执行的节点集合
         FlowElement flowElement = bpmnModel.getFlowElement(taskDefinitionKey);
         List<FlowNode> nextFlowNodes = getNextFlowNodes(flowElement, bpmnModel, variables);
-        // 2. 循环下一个将要执行的节点集合
+
+        // 2. 校验选择的下一个节点的审批人，是否合法
         Map<String, List<Long>> processVariables;
         for (FlowNode nextFlowNode : nextFlowNodes) {
-            // 获取任务节点中的审批人策略
             Integer candidateStrategy = parseCandidateStrategy(nextFlowNode);
             // 2.1 情况一：如果节点中的审批人策略为 发起人自选
             if (ObjUtil.equals(candidateStrategy, BpmTaskCandidateStrategyEnum.START_USER_SELECT.getStrategy())) {
@@ -600,16 +599,16 @@ public class BpmTaskServiceImpl implements BpmTaskService {
                     throw exception(PROCESS_INSTANCE_START_USER_SELECT_ASSIGNEES_NOT_CONFIG, nextFlowNode.getName());
                 }
                 processVariables = FlowableUtils.getStartUserSelectAssignees(processInstance.getProcessVariables());
-                if (processVariables == null){
-                    processVariables = new HashMap<>();
-                }else {
-                    List<Long> startUserSelectAssignee = processVariables.get(nextFlowNode.getId());
-                    // 特殊：如果当前节点已经存在审批人，则不允许覆盖
-                    if (CollUtil.isNotEmpty(startUserSelectAssignee)) {
-                        continue;
-                    }
+                // 特殊：如果当前节点已经存在审批人，则不允许覆盖
+                // TODO @小北：【不用改】通过 if return，让逻辑更简洁一点；虽然会多判断一次 processVariables，但是 if else 层级更少。
+                if (processVariables != null
+                        && CollUtil.isNotEmpty(processVariables.get(nextFlowNode.getId()))) {
+                    continue;
+                }
+                // 设置 PROCESS_INSTANCE_VARIABLE_START_USER_SELECT_ASSIGNEES
+                if (processVariables == null) {
+                    processVariables = new HashMap<>();
                 }
-                // 校验通过的全部节点和审批人
                 processVariables.put(nextFlowNode.getId(), assignees);
                 variables.put(BpmnVariableConstants.PROCESS_INSTANCE_VARIABLE_START_USER_SELECT_ASSIGNEES, processVariables);
             }
@@ -621,16 +620,17 @@ public class BpmTaskServiceImpl implements BpmTaskService {
                     throw exception(PROCESS_INSTANCE_APPROVE_USER_SELECT_ASSIGNEES_NOT_CONFIG, nextFlowNode.getName());
                 }
                 processVariables = FlowableUtils.getApproveUserSelectAssignees(processInstance.getProcessVariables());
-                if (processVariables == null){
+                if (processVariables == null) {
                     processVariables = new HashMap<>();
-                }else  {
+                } else  {
                     List<Long> approveUserSelectAssignee = processVariables.get(nextFlowNode.getId());
                     // 特殊：如果当前节点已经存在审批人，则不允许覆盖
+                    // TODO @小北：这种，应该可以覆盖呢。
                     if (CollUtil.isNotEmpty(approveUserSelectAssignee)) {
                         continue;
                     }
                 }
-                // 校验通过的全部节点和审批人
+                // 设置 PROCESS_INSTANCE_VARIABLE_APPROVE_USER_SELECT_ASSIGNEES
                 processVariables.put(nextFlowNode.getId(), assignees);
                 variables.put(BpmnVariableConstants.PROCESS_INSTANCE_VARIABLE_APPROVE_USER_SELECT_ASSIGNEES, processVariables);
             }