Method and system for testing high and low temperature sealing performance of automatic transmission

The invention discloses a high-low temperature sealing performance test method and system for an automatic transmission, and the method comprises the steps: enabling the temperature of the automatic transmission to be within a first preset temperature range, and enabling the temperature of the automatic transmission to be within a first preset time, according to the operation parameter, the first rotation parameter and the first simulation parameter, the operation state of the clutch and the input shaft rotation speed and the output shaft rotation speed of the automatic transmission are controlled; turning off the temperature adjusting device, controlling the running states of a clutch and a main oil way in the automatic transmission according to the control parameters within a second preset time, heating the transmission to a second preset temperature range, and respectively controlling the rotating speed of an input shaft and the rotating speed of an output shaft of the automatic transmission according to t