Abstract: The three-axis turntable is one of the important equipment for testing inertial platforms and rate gyroscopes,and its metrology support  method has not been perfected in recent years.The measurement performance requirements and general technical requirements of a three-axis turntable have been analyzed,the verification items have been determined,the special standard equipment and special tooling have been configured,the standardized verification method was studied,quantity-value dissemination relationships were constructed，the measurement uncertainty of position error was evaluated as a case and the verification and result analysis were carried out,and the metrology support problem of a certain type of three-axis turntable was solved.

Key words: Turntable, Verification method, Metrology support