diff --git a/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/service/GenTableServiceImpl.java b/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/service/GenTableServiceImpl.java
index 569b2683..3aa61c2f 100644
--- a/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/service/GenTableServiceImpl.java
+++ b/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/service/GenTableServiceImpl.java
@@ -302,7 +302,7 @@ public class GenTableServiceImpl implements IGenTableService {
             tableColumn.setColumnComment(column.getComment());
             tableColumn.setColumnType(column.getOriginType().toLowerCase());
             tableColumn.setSort(column.getPosition());
-            tableColumn.setIsRequired(column.isNullable() ? "1" : "0");
+            tableColumn.setIsRequired(column.isNullable() ? "0" : "1");
             tableColumn.setIsIncrement(column.isAutoIncrement() ? "1" : "0");
             tableColumns.add(tableColumn);
         });