diff --git a/devttl-common/src/main/java/com/devttl/common/utils/poi/ExcelUtil.java b/devttl-common/src/main/java/com/devttl/common/utils/poi/ExcelUtil.java
index 2d6c8b841..4a0445f12 100644
--- a/devttl-common/src/main/java/com/devttl/common/utils/poi/ExcelUtil.java
+++ b/devttl-common/src/main/java/com/devttl/common/utils/poi/ExcelUtil.java
@@ -130,12 +130,12 @@ public class ExcelUtil<T> {
     /**
      * 对象的子列表方法
      */
-    private Map<String, Method> subMethods = new HashMap<>();
+    private Map<String, Method> subMethods;
 
     /**
      * 对象的子列表属性
      */
-    private Map<String, List<Field>> subFieldsMap = new HashMap<>();
+    private Map<String, List<Field>> subFieldsMap;
 
     /**
      * 统计列表
@@ -200,7 +200,10 @@ public class ExcelUtil<T> {
         if (StringUtils.isNotEmpty(title)) {
             int titleLastCol = this.fields.size() - 1;
             if (isSubList()) {
-                titleLastCol = titleLastCol + subFieldsMap.values().size() - 1;
+                for (List<Field> currentSubFields : subFieldsMap.values())
+                {
+                    titleLastCol = titleLastCol + currentSubFields.size() - 1;
+                }
             }
             Row titleRow = sheet.createRow(rownum == 0 ? rownum++ : 0);
             titleRow.setHeightInPoints(30);
@@ -598,9 +601,9 @@ public class ExcelUtil<T> {
                 if (Collection.class.isAssignableFrom(field.getType())) {
                     try {
                         Collection<?> subList = (Collection<?>) getTargetValue(vo, field, excel);
+                        List<Field> currentSubFields = subFieldsMap.get(field.getName());
                         if (subList != null && !subList.isEmpty()) {
                             int subIndex = 0;
-                            List<Field> currentSubFields = subFieldsMap.get(field.getName());
                             for (Object subVo : subList) {
                                 Row subRow = sheet.getRow(currentRowNum + subIndex);
                                 if (subRow == null) {
@@ -614,8 +617,8 @@ public class ExcelUtil<T> {
                                 }
                                 subIndex++;
                             }
-                            column += currentSubFields.size();
                         }
+                        column += currentSubFields.size();
                     } catch (Exception e) {
                         log.error("填充集合数据失败", e);
                     }
@@ -1275,6 +1278,8 @@ public class ExcelUtil<T> {
     public List<Object[]> getFields() {
         List<Object[]> fields = new ArrayList<Object[]>();
         List<Field> tempFields = new ArrayList<>();
+        subFieldsMap = new HashMap<>();
+        subMethods = new HashMap<>();
         tempFields.addAll(Arrays.asList(clazz.getSuperclass().getDeclaredFields()));
         tempFields.addAll(Arrays.asList(clazz.getDeclaredFields()));
         if (StringUtils.isNotEmpty(includeFields)) {