diff --git a/jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/extbpm/process/common/expression/FlowNodeExpression.java b/jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/extbpm/process/common/expression/FlowNodeExpression.java
index 7eeb5ee..f9e7874 100644
--- a/jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/extbpm/process/common/expression/FlowNodeExpression.java
+++ b/jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/extbpm/process/common/expression/FlowNodeExpression.java
@@ -5,6 +5,9 @@ import com.alibaba.fastjson.JSONObject;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang.StringUtils;
+import org.flowable.engine.RuntimeService;
+import org.flowable.engine.delegate.DelegateExecution;
+import org.flowable.engine.runtime.Execution;
 import org.jeecg.common.constant.SymbolConstant;
 import org.jeecg.common.system.api.ISysBaseAPI;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -26,6 +29,8 @@ public class FlowNodeExpression {
     // 自动注入 + 自动延迟加载（解决循环依赖）
     private final @Lazy ISysBaseAPI sysbase;
 
+    private final RuntimeService runtimeService;
+
 
     /**
      * 查找当前部门负责人
@@ -87,6 +92,76 @@ public class FlowNodeExpression {
         return ISysBaseAPI.getUsersListByJsonLocalAPI(jsonData,deptKeyName,roleId);
     }
 
+    /**
+     * Get username list by department id and role id.
+     * Example: ${flowNodeExpression.getUsersListByDeptAndRole('deptIdValue', 'roleIdValue')}
+     *
+     * @param deptId department id
+     * @param roleId role id
+     * @return username list
+     */
+    public List<String> getUsersListByDeptAndRole(String deptId, String roleId) {
+        if (StringUtils.isBlank(deptId) || StringUtils.isBlank(roleId)) {
+            return Collections.emptyList();
+        }
+
+        JSONObject json = new JSONObject();
+        json.put("deptId", deptId);
+        return ISysBaseAPI.getUsersListByJsonLocalAPI(json, "deptId", roleId);
+    }
+
+    /**
+     * Get subprocess variable.
+     * Example: ${flowNodeExpression.getSonProcessVariable(execution, 'subApproveUser')}
+     *
+     * @param execution current execution
+     * @param variableName subprocess variable name
+     * @return username list
+     */
+    public List<String> getSonProcessVariable(DelegateExecution execution, String variableName) {
+        if (execution == null || StringUtils.isBlank(variableName)) {
+            return Collections.emptyList();
+        }
+
+        try {
+            if (execution.hasVariableLocal(variableName)) {
+                return splitUsernames(execution.getVariableLocal(variableName));
+            }
+
+            List<Execution> executions = runtimeService.createExecutionQuery()
+                    .processInstanceId(execution.getProcessInstanceId())
+                    .list();
+            for (Execution childExecution : executions) {
+                if (execution.getId().equals(childExecution.getId())) {
+                    continue;
+                }
+                Object localVariable = runtimeService.getVariableLocal(childExecution.getId(), variableName);
+                if (localVariable != null) {
+                    return splitUsernames(localVariable);
+                }
+            }
+
+            Object variable = execution.getVariable(variableName);
+            if (variable != null) {
+                return splitUsernames(variable);
+            }
+        } catch (Exception e) {
+            log.warn("getSonProcessVariable failed, executionId={}, variableName={}",
+                    execution.getId(), variableName, e);
+        }
+        return Collections.emptyList();
+    }
+
+    private List<String> splitUsernames(Object value) {
+        if (value == null) {
+            return Collections.emptyList();
+        }
+        return Arrays.stream(String.valueOf(value).split(SymbolConstant.COMMA))
+                .map(String::trim)
+                .filter(StringUtils::isNotBlank)
+                .collect(Collectors.toList());
+    }
+
     /**
      * 查找上一级部门负责人
      * ${flowNodeExpression.getLevel1DepartLeaders(applyUserId)}