diff --git a/jeecg-boot/jeecg-boot-base-core/src/main/java/org/jeecg/config/mybatis/MybatisInterceptor.java b/jeecg-boot/jeecg-boot-base-core/src/main/java/org/jeecg/config/mybatis/MybatisInterceptor.java
index aef2266..43fe118 100644
--- a/jeecg-boot/jeecg-boot-base-core/src/main/java/org/jeecg/config/mybatis/MybatisInterceptor.java
+++ b/jeecg-boot/jeecg-boot-base-core/src/main/java/org/jeecg/config/mybatis/MybatisInterceptor.java
@@ -192,7 +192,9 @@ public class MybatisInterceptor implements Interceptor {
 	private LoginUser getLoginUser() {
 		LoginUser sysUser = null;
 		try {
-			sysUser = SecurityUtils.getSubject().getPrincipal() != null ? (LoginUser) SecurityUtils.getSubject().getPrincipal() : null;
+			if (SecurityUtils.getSubject().getPrincipal() != null && SecurityUtils.getSubject().getPrincipal() instanceof LoginUser){
+				sysUser = (LoginUser) SecurityUtils.getSubject().getPrincipal();
+			}
 		} catch (Exception e) {
 			//e.printStackTrace();
 			sysUser = null;