I just login my google account to another phone. So my contacts automatically imported. but now i want to delete that contacts from that phone but not from the google account?
Welcome to Android Central! If those contacts were saved to the local Phone account, then go to Settings>Apps, tap Menu>Show System, and look for Contact Storage. Clear Cache/Data from that, then open Contacts again. All contacts should be wiped out, but your Google account contacts should resync promptly.