diff --git a/backend/src/main/java/com/designhub/service/ThirdPartyDbService.java b/backend/src/main/java/com/designhub/service/ThirdPartyDbService.java
index c5ae834..15ec7b2 100644
--- a/backend/src/main/java/com/designhub/service/ThirdPartyDbService.java
+++ b/backend/src/main/java/com/designhub/service/ThirdPartyDbService.java
@@ -108,13 +108,15 @@ 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
-                // 需要确保java.security中已移除TLSv1的禁用
+                // 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=*",
                     config.getHost(), config.getPort(), config.getDatabase());
-                // 在连接前设置系统属性以启用TLS 1.0
+                // 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");
-                java.security.Security.setProperty("jdk.tls.disabledAlgorithms", "SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC, anon, NULL");
+                // 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";