diff --git a/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx b/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
index a99f4680..e8863c73 100644
--- a/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
+++ b/v2rayN/ServiceLib/Resx/ResUI.zh-Hans.resx
@@ -1402,7 +1402,7 @@
     <value>直连 DNS</value>
   </data>
   <data name="TbSBOutboundsResolverDNS" xml:space="preserve">
-    <value>出站 DNS 解析</value>
+    <value>出站 DNS 解析（sing-box）</value>
   </data>
   <data name="TbSBOutboundDomainResolve" xml:space="preserve">
     <value>解析出站域名</value>
diff --git a/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs b/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs
index 90df8df6..452e1976 100644
--- a/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigSingboxService.cs
@@ -1603,7 +1603,20 @@ public class CoreConfigSingboxService
 
             singboxConfig.dns ??= new Dns4Sbox();
             singboxConfig.dns.independent_cache = true;
-            singboxConfig.dns.final = "dns_remote"; // TODO: Select fallback DNS server based on routing rules
+
+            var routing = await ConfigHandler.GetDefaultRouting(_config);
+            var useDirectDns = false;
+            if (routing != null)
+            {
+                var rules = JsonUtils.Deserialize<List<RulesItem>>(routing.RuleSet) ?? [];
+
+                useDirectDns = rules?.LastOrDefault() is { } lastRule &&
+                                  lastRule.OutboundTag == Global.DirectTag &&
+                                  (lastRule.Port == "0-65535" ||
+                                   lastRule.Network == "tcp,udp" ||
+                                   lastRule.Ip?.Contains("0.0.0.0/0") == true);
+            }
+            singboxConfig.dns.final = useDirectDns ? "dns_direct" : "dns_remote";
         }
         catch (Exception ex)
         {
diff --git a/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs b/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs
index 6cb570b0..ec570b03 100644
--- a/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/CoreConfigV2rayService.cs
@@ -1232,9 +1232,10 @@ public class CoreConfigV2rayService
         }
 
         var routing = await ConfigHandler.GetDefaultRouting(_config);
+        List<RulesItem>? rules = null;
         if (routing != null)
         {
-            var rules = JsonUtils.Deserialize<List<RulesItem>>(routing.RuleSet) ?? [];
+            rules = JsonUtils.Deserialize<List<RulesItem>>(routing.RuleSet) ?? [];
             foreach (var item in rules)
             {
                 if (!item.Enabled || item.Domain is null || item.Domain.Count == 0)
@@ -1317,7 +1318,14 @@ public class CoreConfigV2rayService
         AddDnsServers(directDNSAddress, directGeositeList);
         AddDnsServers(directDNSAddress, expectedDomainList, expectedIPs);
 
-        v2rayConfig.dns.servers.AddRange(remoteDNSAddress);
+        var useDirectDns = rules?.LastOrDefault() is { } lastRule &&
+                          lastRule.OutboundTag == Global.DirectTag &&
+                          (lastRule.Port == "0-65535" ||
+                           lastRule.Network == "tcp,udp" ||
+                           lastRule.Ip?.Contains("0.0.0.0/0") == true);
+
+        var defaultDnsServers = useDirectDns ? directDNSAddress : remoteDNSAddress;
+        v2rayConfig.dns.servers.AddRange(defaultDnsServers);
 
         return 0;
     }