diff --git a/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/UserTokenService.java b/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/UserTokenService.java
index 0f17a30..d52ff73 100644
--- a/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/UserTokenService.java
+++ b/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/UserTokenService.java
@@ -34,7 +34,7 @@ public interface UserTokenService {
     String getToken(HttpServletRequest request);
 
     /**
-     * 获取登录用户名
+     * 根据令牌token, 获取登录用户名
      *
      * @param token
      * @return 登录用户名
diff --git a/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/filter/JwtAuthenticationTokenFilter.java b/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/filter/JwtAuthenticationTokenFilter.java
index e22fc25..b3961db 100644
--- a/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/filter/JwtAuthenticationTokenFilter.java
+++ b/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/filter/JwtAuthenticationTokenFilter.java
@@ -33,7 +33,7 @@ public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
     @Autowired
     UserTokenService userTokenService;
     //@Autowired
-    //UserDetailsService userDetailsService;
+    // UserDetailsService userDetailsService;
     @Autowired
     AuthenticationResult authenticationResult;
 
@@ -49,14 +49,14 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
         try {
             UserDetails userDetails = userTokenService.getUserDetails(token);
 
-            //userDetailsService.loadUserByUsername(userName);
-
             if (userDetails != null && SecurityContextHolder.getContext().getAuthentication() == null) {
+                // 认证成功吧 Authentication 对象 setAuthenticated(true), 然存到 SecurityContext 中
+                // 认证失败则清空 SecurityContext 然后交给下一个 Filter 处理
                 UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(userDetails, null, userDetails.getAuthorities());
                 authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
                 SecurityContextHolder.getContext().setAuthentication(authenticationToken);
 
-                //设置登录
+                // 设置登录
                 JwtUserDetails jwtUserDetails = (JwtUserDetails) userDetails;
 
                 AuthenticationUser authenticationUser = AuthenticationUserFactory.getByJwtUser(jwtUserDetails);
@@ -70,7 +70,7 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
 
         filterChain.doFilter(request, response);
 
-        //清除登录信息
+        // 清除登录信息
         UserContextUtil.clear();
     }
 }
diff --git a/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/jwt/JwtUserDetailsService.java b/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/jwt/JwtUserDetailsService.java
index 0774e1b..43ca1b7 100644
--- a/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/jwt/JwtUserDetailsService.java
+++ b/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/jwt/JwtUserDetailsService.java
@@ -8,6 +8,21 @@
  */
 public interface JwtUserDetailsService {
 
+    /**
+     * 验证令牌的有效性
+     * 通过验证salt的有效性，来达到认证用户令牌的有效性
+     * 这里的有效性不是令牌有效时间的有效性，可以在一下几个场景使用：
+     * - 1. 用户注销，重置下 salt 使 令牌失效
+     * - 2. 多地登陆，控制登录账号数量
+     *
+     * @param userDetails
+     * @param salt
+     * @return
+     */
+    default boolean verifySalt(UserDetails userDetails, String salt) {
+        return true;
+    }
+
     /**
      * 通过用户Id获取用户详情
      *
@@ -15,4 +30,6 @@ public interface JwtUserDetailsService {
      * @return
      */
     UserDetails loadUserByUserId(Long userId);
+
+
 }
diff --git a/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/jwt/JwtUserTokenService.java b/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/jwt/JwtUserTokenService.java
index ac02c18..e7c6a3e 100644
--- a/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/jwt/JwtUserTokenService.java
+++ b/security-spring-boot-starter/src/main/java/com/admin4j/framework/security/jwt/JwtUserTokenService.java
@@ -101,7 +101,14 @@ public UserDetails getUserDetails(String token) {
                 .build();
         verifier.verify(token);
 
-        return jwtUserDetailsService.loadUserByUserId(userId);
+        // 可以验证下 salt 是否有效，用来验证令牌是否已注销
+        UserDetails userDetails = jwtUserDetailsService.loadUserByUserId(userId);
+        if (userDetails != null) {
+            if (!jwtUserDetailsService.verifySalt(userDetails, jwt.getClaim(FILED_SALT).asString())) {
+                return null;
+            }
+        }
+        return userDetails;
     }
 
     private String generateSecret(String salt) {