diff --git a/packages/system/kubeovn/charts/kube-ovn/templates/ovncni-ds.yaml b/packages/system/kubeovn/charts/kube-ovn/templates/ovncni-ds.yaml
index 63f4258..dafe1fd 100644
--- a/packages/system/kubeovn/charts/kube-ovn/templates/ovncni-ds.yaml
+++ b/packages/system/kubeovn/charts/kube-ovn/templates/ovncni-ds.yaml
@@ -112,6 +112,9 @@ spec:
           - --secure-serving={{- .Values.func.SECURE_SERVING }}
           - --enable-ovn-ipsec={{- .Values.func.ENABLE_OVN_IPSEC }}
           - --set-vxlan-tx-off={{- .Values.func.SET_VXLAN_TX_OFF }}
+          {{- with .Values.mtu }}
+          - --mtu={{ . }}
+          {{- end }}
         securityContext:
           runAsUser: 0
           privileged: false
