The utility model discloses an AT gearbox parking mechanism performance and durability test device which comprises a test bench. A fixation tool which is used for fixing an AT gearbox to be tested and a shift control mechanism which is used for controlling automatic shift of the AT gearbox to be tested are arranged on the test bench. The input end of the AT gearbox to be tested is connected with a first motor through an input shaft. The output end of the AT gearbox to be tested is connected with a second motor through an output shaft. The shift control mechanism comprises a shift drive motor and a shift cable. An output shaft of the shift drive motor is in transmission connection with one end of the shift cable through a shift component. The other end of the shift cable is in transmission connection with a shift mechanism assembly in the AT gearbox to be tested. A telescopic mechanism which enables four sides of the test bench to tilt at different angles is arranged below the test bench. The AT gearbox parking mechanism performance and durability test device provided by the utility model has the characteristics of convenient operation and high detection efficiency.