diff --git a/.env.example b/.env.example
index 3b115e8..ed19778 100644
--- a/.env.example
+++ b/.env.example
@@ -99,4 +99,5 @@ REQUEST_TIMEOUT=30
 RESPONSE_TIMEOUT=30
 
 # 空闲连接超时时间（秒）- 控制连接池中空闲连接的生存时间
-IDLE_CONN_TIMEOUT=120
\ No newline at end of file
+IDLE_CONN_TIMEOUT=120
+DATABASE_DSN="user:password@tcp(127.0.0.1:3306)/dbname?charset=utf8mb4&parseTime=True&loc=Local"
\ No newline at end of file
diff --git a/internal/db/database.go b/internal/db/database.go
index c7bb454..584a608 100644
--- a/internal/db/database.go
+++ b/internal/db/database.go
@@ -15,8 +15,10 @@ import (
 var DB *gorm.DB
 
 func InitDB() (*gorm.DB, error) {
-	// TODO: 从配置中心读取DSN
-	dsn := "root:1236@tcp(127.0.0.1:3306)/gpt_load?charset=utf8mb4&parseTime=True&loc=Local"
+	dsn := os.Getenv("DATABASE_DSN")
+	if dsn == "" {
+		return nil, fmt.Errorf("DATABASE_DSN environment variable not set")
+	}
 
 	newLogger := logger.New(
 		log.New(os.Stdout, "\r\n", log.LstdFlags), // io writer