diff --git a/.gitignore b/.gitignore
index 5b7c484..04ef99a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 demo
 demo.toml
 *.log
-*.bak
\ No newline at end of file
+*.bak
+list.json
\ No newline at end of file
diff --git a/auth/auth.go b/auth/auth.go
index 0705b8d..fdc5833 100644
--- a/auth/auth.go
+++ b/auth/auth.go
@@ -18,7 +18,7 @@ var (
 
 func Init(cfg *config.Config) {
 	if cfg.Blacklist.Enabled {
-		LoadBlacklist(cfg)
+		InitBlacklist(cfg)
 	}
 	if cfg.Whitelist.Enabled {
 		LoadWhitelist(cfg)
diff --git a/auth/blacklist.go b/auth/blacklist.go
index 3aac712..ba2091b 100644
--- a/auth/blacklist.go
+++ b/auth/blacklist.go
@@ -2,59 +2,89 @@ package auth
 
 import (
 	"encoding/json"
+	"fmt"
 	"ghproxy/config"
 	"os"
 	"strings"
+	"sync"
 )
 
-type BlacklistConfig struct {
-	Blacklist []string `json:"blacklist"`
+type Blacklist struct {
+	userSet     map[string]struct{}            // 用户级黑名单
+	repoSet     map[string]map[string]struct{} // 仓库级黑名单
+	initOnce    sync.Once                      // 确保初始化只执行一次
+	initialized bool                           // 初始化状态标识
 }
 
 var (
-	cfg           *config.Config
-	blacklistfile = "/data/ghproxy/config/blacklist.json"
-	blacklist     *BlacklistConfig
+	instance *Blacklist
+	initErr  error
 )
 
-func LoadBlacklist(cfg *config.Config) {
-	blacklistfile = cfg.Blacklist.BlacklistFile
-	blacklist = &BlacklistConfig{}
+// InitBlacklist 初始化黑名单（线程安全，仅执行一次）
+func InitBlacklist(cfg *config.Config) error {
+	instance = &Blacklist{
+		userSet: make(map[string]struct{}),
+		repoSet: make(map[string]map[string]struct{}),
+	}
 
-	data, err := os.ReadFile(blacklistfile)
+	data, err := os.ReadFile(cfg.Blacklist.BlacklistFile)
 	if err != nil {
-		logError("Failed to read blacklist file: %v", err)
+		return fmt.Errorf("failed to read blacklist: %w", err)
 	}
 
-	err = json.Unmarshal(data, blacklist)
-	if err != nil {
-		logError("Failed to unmarshal blacklist JSON: %v", err)
+	var list struct {
+		Entries []string `json:"blacklist"`
 	}
-}
-
-func CheckBlacklist(repouser string, user string, repo string) bool {
-	return forRangeCheckBlacklist(blacklist.Blacklist, repouser, user)
-}
-
-func sliceRepoName_Blacklist(fullrepo string) (string, string) {
-	s := strings.Split(fullrepo, "/")
-	if len(s) != 2 {
-		return "", ""
+	if err := json.Unmarshal(data, &list); err != nil {
+		return fmt.Errorf("invalid blacklist format: %w", err)
 	}
-	return s[0], s[1]
-}
 
-func forRangeCheckBlacklist(blist []string, fullrepo string, user string) bool {
-	for _, blocked := range blist {
-		users, _ := sliceRepoName_Blacklist(blocked)
-		if user == users {
-			if strings.HasSuffix(blocked, "/*") {
-				return true
-			}
-			if fullrepo == blocked {
-				return true
+	for _, entry := range list.Entries {
+		user, repo := splitUserRepo(entry)
+		switch {
+		case repo == "" || repo == "*":
+			instance.userSet[user] = struct{}{}
+		default:
+			if _, exists := instance.repoSet[user]; !exists {
+				instance.repoSet[user] = make(map[string]struct{})
 			}
+			instance.repoSet[user][repo] = struct{}{}
 		}
 	}
+
+	instance.initialized = true
+	return nil
+}
+
+// CheckBlacklist 检查用户和仓库是否在黑名单中（无锁设计）
+func CheckBlacklist(username, repo string) bool {
+	if instance == nil || !instance.initialized {
+		return false
+	}
+
+	// 先检查用户级黑名单
+	if _, exists := instance.userSet[username]; exists {
+		return true
+	}
+
+	// 再检查仓库级黑名单
+	if repos, userExists := instance.repoSet[username]; userExists {
+		// 允许仓库名为空时的全用户仓库匹配
+		if repo == "" {
+			return true
+		}
+		_, repoExists := repos[repo]
+		return repoExists
+	}
+
 	return false
 }
+
+// splitUserRepo 优化分割逻辑（仅初始化时使用）
+func splitUserRepo(fullRepo string) (user, repo string) {
+	if idx := strings.Index(fullRepo, "/"); idx > 0 {
+		return fullRepo[:idx], fullRepo[idx+1:]
+	}
+	return fullRepo, ""
+}
diff --git a/config/blacklist.json b/config/blacklist.json
index 839d3f6..c1ed260 100644
--- a/config/blacklist.json
+++ b/config/blacklist.json
@@ -1,7 +1,7 @@
 {
   "blacklist": [
-    "black/list",
-    "test/test1",
-    "example/*"
+    "eviluser",
+    "spamuser/bad-repo",
+    "malwareuser/*"
   ]
 }
\ No newline at end of file
diff --git a/proxy/handler.go b/proxy/handler.go
index a052125..480aa67 100644
--- a/proxy/handler.go
+++ b/proxy/handler.go
@@ -73,7 +73,7 @@ func NoRouteHandler(cfg *config.Config, limiter *rate.RateLimiter, iplimiter *ra
 
 		// 黑名单检查
 		if cfg.Blacklist.Enabled {
-			blacklist := auth.CheckBlacklist(repouser, username, repo)
+			blacklist := auth.CheckBlacklist(username, repo)
 			if blacklist {
 				logErrMsg := fmt.Sprintf("%s %s %s %s %s Blacklist Blocked repo: %s", c.ClientIP(), c.Request.Method, rawPath, c.Request.Header.Get("User-Agent"), c.Request.Proto, repouser)
 				errMsg := fmt.Sprintf("Blacklist Blocked repo: %s", repouser)