The invention discloses a testing method of intelligent transformer station network digitization equipment, which is characterized by comprising the steps that a high voltage side and a low voltage side of a transformer are connected with special testers respectively; optical fiber communication ends of the special tester are connected into intelligent terminals and a standby optical fiber communicated with a transformer protection device; and the standby optical fiber is connected into a computer on one side of the transformer protection device. According to the testing method, more than two special testers, the computer, and the standby optical fiber of an intelligent transformer station are utilized, so that all-project non-intervention automatic testing of an intelligent terminal-merging unit-protection device function of the intelligent transformer station can be achieved.