Air valve testing jig

The utility model relates to an air valve testing jig, which comprises a bottom plate, a hold-down unit, a drive unit and a positioning unit. The hold-down unit comprises first and second bearing seats for supporting the two ends of an air valve, and an air pressure control system for pressing the air valve onto the first and second supporting seats. The hold-down unit is fixedly arranged on the bottom plate. The drive unit comprises a motor and a transmission mechanism. The transmission mechanism is in transmission connection with the rotating shaft of the motor and is used for driving a pressing wheel to rotate. The positioning unit comprises a positioning plate for axially positioning the air valve, and a rod-end positioning column arranged on the positioning plate and in contact with the end surface of the valve stem of the air valve. The air valve testing jig can be used for testing various air valves and has the advantages of higher testing quality and efficiency, reliable clamping, stable rotation and