diff --git a/internal/web/actions/default/servers/create.go b/internal/web/actions/default/servers/create.go
index c87b2251..0c24df83 100644
--- a/internal/web/actions/default/servers/create.go
+++ b/internal/web/actions/default/servers/create.go
@@ -10,6 +10,7 @@ import (
 	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs/sslconfigs"
 	"github.com/iwind/TeaGo/actions"
 	"github.com/iwind/TeaGo/maps"
+	"strings"
 )
 
 type CreateAction struct {
@@ -215,6 +216,22 @@ func (this *CreateAction) RunPost(params struct {
 		if err != nil {
 			this.Fail("域名解析失败：" + err.Error())
 		}
+
+		// 检查域名是否已经存在
+		allServerNames := serverconfigs.PlainServerNames(serverNames)
+		if len(allServerNames) > 0 {
+			dupResp, err := this.RPC().ServerRPC().CheckServerNameDuplicationInNodeCluster(this.AdminContext(), &pb.CheckServerNameDuplicationInNodeClusterRequest{
+				ServerNames:   allServerNames,
+				NodeClusterId: params.ClusterId,
+			})
+			if err != nil {
+				this.ErrorPage(err)
+				return
+			}
+			if len(dupResp.DuplicatedServerNames) > 0 {
+				this.Fail("域名 " + strings.Join(dupResp.DuplicatedServerNames, ", ") + " 已经被其他服务所占用，不能重复使用")
+			}
+		}
 	}
 
 	// 源站地址
diff --git a/internal/web/actions/default/servers/server/settings/serverNames/index.go b/internal/web/actions/default/servers/server/settings/serverNames/index.go
index 73d8d892..44a7de5b 100644
--- a/internal/web/actions/default/servers/server/settings/serverNames/index.go
+++ b/internal/web/actions/default/servers/server/settings/serverNames/index.go
@@ -9,6 +9,7 @@ import (
 	"github.com/iwind/TeaGo/actions"
 	"github.com/iwind/TeaGo/maps"
 	timeutil "github.com/iwind/TeaGo/utils/time"
+	"strings"
 )
 
 // 域名管理
@@ -74,6 +75,34 @@ func (this *IndexAction) RunPost(params struct {
 		this.Fail("域名解析失败：" + err.Error())
 	}
 
+	serverResp, err := this.RPC().ServerRPC().FindEnabledUserServerBasic(this.AdminContext(), &pb.FindEnabledUserServerBasicRequest{ServerId: params.ServerId})
+	if err != nil {
+		this.ErrorPage(err)
+		return
+	}
+	if serverResp.Server == nil || serverResp.Server.NodeCluster == nil {
+		this.NotFound("server", params.ServerId)
+		return
+	}
+	clusterId := serverResp.Server.NodeCluster.Id
+
+	// 检查域名是否已经存在
+	allServerNames := serverconfigs.PlainServerNames(serverNames)
+	if len(allServerNames) > 0 {
+		dupResp, err := this.RPC().ServerRPC().CheckServerNameDuplicationInNodeCluster(this.AdminContext(), &pb.CheckServerNameDuplicationInNodeClusterRequest{
+			ServerNames:     allServerNames,
+			NodeClusterId:   clusterId,
+			ExcludeServerId: params.ServerId,
+		})
+		if err != nil {
+			this.ErrorPage(err)
+			return
+		}
+		if len(dupResp.DuplicatedServerNames) > 0 {
+			this.Fail("域名 " + strings.Join(dupResp.DuplicatedServerNames, ", ") + " 已经被其他服务所占用，不能重复使用")
+		}
+	}
+
 	_, err = this.RPC().ServerRPC().UpdateServerNames(this.AdminContext(), &pb.UpdateServerNamesRequest{
 		ServerId:        params.ServerId,
 		ServerNamesJSON: []byte(params.ServerNames),