you may want to try experimental resolver as noted in https://github.com/rancher-sandbox/rancher-desktop/issues/1899#issuecomment-1109128277 or you can update the dnsmasq config for your DNS host as that is the IP in resolv.conf https://github.com/rancher-sandbox/rancher-desktop/issues/1747

I founf wsl version 1 can setup dns well. But rancher destop can only version 2

yeah wsl1 doesn’t use virtualized networking so networking is far different in wsl2. the experimental host resolver feature operates outside the VM similar to packet flows for wsl1 so you may want to give that a go