diff --git a/0001-etcd-3.5.21-add-support-for-loong64.patch b/0001-etcd-3.5.21-add-support-for-loong64.patch
new file mode 100644
index 0000000000000000000000000000000000000000..2ab0d4007d72b5f1a0cea124d4a704ae187e4fb3
--- /dev/null
+++ b/0001-etcd-3.5.21-add-support-for-loong64.patch
@@ -0,0 +1,24 @@
+From eab1f6723a920225d476ab18197ab62070eccf2b Mon Sep 17 00:00:00 2001
+From: doupengda <doupengda@loongson.cn>
+Date: Thu, 12 Mar 2026 20:19:41 +0800
+Subject: [PATCH] etcd-3.5.21 add support for loong64
+
+---
+ server/etcdmain/etcd.go | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/server/etcdmain/etcd.go b/server/etcdmain/etcd.go
+index 9921b89..9808136 100644
+--- a/server/etcdmain/etcd.go
++++ b/server/etcdmain/etcd.go
+@@ -472,6 +472,7 @@ func checkSupportArch() {
+ 	if runtime.GOARCH == "amd64" ||
+ 		runtime.GOARCH == "arm64" ||
+ 		runtime.GOARCH == "ppc64le" ||
++		runtime.GOARCH == "loong64" ||
+ 		runtime.GOARCH == "s390x" {
+ 		return
+ 	}
+-- 
+2.43.7
+
diff --git a/etcd.spec b/etcd.spec
index 5e038bb8fc6288c4daace8015f3ba14c6744c57d..c355cad911d9e3060cfc9676999c12a044018de1 100644
--- a/etcd.spec
+++ b/etcd.spec
@@ -3,7 +3,7 @@
 Summary:       Highly-available key value store for configuration and service discovery
 Name:          etcd
 Version:       3.5.21
-Release:       1%{?dist}
+Release:       2%{?dist}
 License:       Apache-2.0
 URL:           https://github.com/etcd-io/etcd
 Source0:       %{url}/archive/refs/tags/v%{version}.tar.gz
@@ -11,6 +11,8 @@ Source1:       vendor.tar.gz
 Source2:       %{name}.conf
 Source3:       %{name}.service
 
+Patch3000:     0001-etcd-3.5.21-add-support-for-loong64.patch
+
 BuildRequires: systemd-rpm-macros golang go-rpm-macros
 Requires(pre): shadow-utils
 
@@ -75,6 +77,10 @@ getent passwd %{name} >/dev/null || useradd -r -g %{name} -d %{_sharedstatedir}/
 %{_bindir}/%{name}
 
 %changelog
+* Thu Mar 12 2026 doupengda <doupengda@loongson.cn> - 3.5.21-2
+- [Type] other
+- [DESC] add support for loongarch64
+
 * Tue Apr 22 2025 jackeyji <jackeyji@tencent.com> - 3.5.21-1
 - [Type] security
 - [DESC] upgrade to 3.5.21 to fix CVE-2024-4436 and CVE-2024-4438