diff --git a/common/common-online/src/main/java/apelet/common/online/controller/OnlineFormController.java b/common/common-online/src/main/java/apelet/common/online/controller/OnlineFormController.java
index c2f18e1..83fdfd2 100644
--- a/common/common-online/src/main/java/apelet/common/online/controller/OnlineFormController.java
+++ b/common/common-online/src/main/java/apelet/common/online/controller/OnlineFormController.java
@@ -652,10 +652,16 @@ public class OnlineFormController {
                 if (isTableColumn) {
                     // 子表列：字段类型沿用现状，硬编码 750
                     this.saveField(750, widget.getString("showName"), null, head, columnName, extractSlaveTableId(widget));
+                    // 子表列：已有 variableName 标签才转驼峰反写字段名，没有则不动
+                    if (widget.containsKey("variableName")) {
+                        widget.put("variableName", StrUtil.toCamelCase(columnName));
+                    }
                 } else {
                     JSONObject bindData = widget.getJSONObject("bindData");
                     String ref = bindData.containsKey("slaveTableId") ? bindData.getString("slaveTableId") : null;
                     this.saveField(widgetType, bindData.getString("columnComment"), widget.getString("showName"), head, columnName, ref);
+                    // 新增字段：将字段名转驼峰后反写到 variableName，保证表单变量名与数据库字段一致
+                    widget.put("variableName", StrUtil.toCamelCase(columnName));
                 }
                 newColumnNames.add(columnName);
                 changed = true;
@@ -930,6 +936,10 @@ public class OnlineFormController {
             String columnName = fieldBd.getString("columnName");
             String showName = fieldWidget.getString("showName");
             this.saveField(fieldWidget.getInteger("widgetType"), fieldBd.getString("columnComment"), showName, subHead, columnName, null);
+            // 小程序端新增字段：已有 variableName 标签则转驼峰反写字段名，没有则不动
+            if (fieldWidget.containsKey("variableName")) {
+                fieldWidget.put("variableName", StrUtil.toCamelCase(columnName));
+            }
         }
         // ALTER TABLE ADD COLUMN
         onlFormHeadService.syncDB(subHead, 0L);