The utility model provides an SF6 gas insulation high voltage electrical apparatus-used insulating part partial discharge test device. The device is composed of a tank (3), an SF6 valve system (2) and a 72.5kV composite casing (1). The tank is a cavity structure, and the mechanical strength of the tank can withstand the intensity of pressure up to 0.5MPa of the pressure of SF6 gas; the SF6 valve system acts as a connection joint when the test device is deflated and aerated; the SF6 valve system is composed of a valve block and self-sealing joints, wherein the interior of the valve block is a four-through structure; after assembled, the SF6 gas valve system can be simultaneously connected with a gas cylinder, vacuumizing equipment and a pressure gauge, and therefore, the possibility that air enters the tank can be eliminated, and the purity of the SF6 gas in the tank of the test device can be ensured; and an internal conductor used for turning on voltage is arranged inside the casing, and can extend into the tank through the casing. The SF6 gas insulation high voltage electrical apparatus-used insulating part partial discharge test device of the utility model is suitable for high voltage electrical apparatus-used insulating part partial discharge tests.