diff --git a/backend/src/main/java/com/designhub/service/ThirdPartyDbService.java b/backend/src/main/java/com/designhub/service/ThirdPartyDbService.java
index c632498..59d6679 100644
--- a/backend/src/main/java/com/designhub/service/ThirdPartyDbService.java
+++ b/backend/src/main/java/com/designhub/service/ThirdPartyDbService.java
@@ -108,15 +108,9 @@ public class ThirdPartyDbService {
         switch (config.getDbType().toLowerCase()) {
             case "sqlserver":
                 driverClass = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
-                // 使用TLS 1.0协议连接旧版SQL Server - 放宽所有安全限制
-                url = String.format("jdbc:sqlserver://%s:%d;databaseName=%s;encrypt=true;trustServerCertificate=true;TrustServerCertificate=true;hostNameInCertificate=*",
+                // 禁用加密以绕过TLS版本问题（旧版SQL Server只支持TLS 1.0）
+                url = String.format("jdbc:sqlserver://%s:%d;databaseName=%s;encrypt=false;trustServerCertificate=true",
                     config.getHost(), config.getPort(), config.getDatabase());
-                // 在连接前设置系统属性以启用TLS 1.0和旧版证书算法
-                System.setProperty("https.protocols", "TLSv1,TLSv1.1,TLSv1.2");
-                // 清除TLS禁用算法列表
-                java.security.Security.setProperty("jdk.tls.disabledAlgorithms", "");
-                // 清除证书路径禁用算法列表
-                java.security.Security.setProperty("jdk.certpath.disabledAlgorithms", "");
                 break;
             case "mysql":
                 driverClass = "com.mysql.cj.jdbc.Driver";