diff --git a/internal/db/models/ns_cluster_model_ext.go b/internal/db/models/ns_cluster_model_ext.go
index c487d72a..766d5496 100644
--- a/internal/db/models/ns_cluster_model_ext.go
+++ b/internal/db/models/ns_cluster_model_ext.go
@@ -3,7 +3,6 @@ package models
 import (
 	"encoding/json"
 	"github.com/TeaOSLab/EdgeAPI/internal/remotelogs"
-	"github.com/TeaOSLab/EdgeCommon/pkg/dnsconfigs"
 	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs/ddosconfigs"
 )
 
@@ -29,47 +28,3 @@ func (this *NSCluster) HasDDoSProtection() bool {
 	}
 	return false
 }
-
-// DecodeHosts 解析主机地址
-func (this *NSCluster) DecodeHosts() []string {
-	if IsNull(this.Hosts) {
-		return nil
-	}
-
-	var hosts = []string{}
-	err := json.Unmarshal(this.Hosts, &hosts)
-	if err != nil {
-		remotelogs.Error("NSCluster.DecodeHosts", "decode failed: "+err.Error())
-	}
-
-	return hosts
-}
-
-// DecodeSOAConfig 解析SOA设置
-func (this *NSCluster) DecodeSOAConfig() *dnsconfigs.NSSOAConfig {
-	var config = dnsconfigs.DefaultNSSOAConfig()
-	if IsNull(this.Soa) {
-		return config
-	}
-	err := json.Unmarshal(this.Soa, config)
-	if err != nil {
-		remotelogs.Error("NSCluster.DecodeSOAConfig", "decode failed: "+err.Error())
-	}
-	return config
-}
-
-// DecodeAnswerConfig 解析应答设置
-func (this *NSCluster) DecodeAnswerConfig() *dnsconfigs.NSAnswerConfig {
-	var config = dnsconfigs.DefaultNSAnswerConfig()
-
-	if IsNull(this.Answer) {
-		return config
-	}
-
-	err := json.Unmarshal(this.Answer, config)
-	if err != nil {
-		remotelogs.Error("NSCluster.DecodeAnswerConfig", "decode failed: "+err.Error())
-	}
-
-	return config
-}