The utility model discloses a full automatic break ware chassis car mechanical durability testing system, including the touch -sensitive screen for as the input that sets up test parameter and control mode, PLC core processing unit for input setting to location State data signal and touch -sensitive screen is handled, exports a control command signal, servo controller for control servo motor, send the 2nd control command signal, servo motor for the position of control circuit breaker chassis car examination article, the torque sensor unit for gather the moment of torsion on the circuit breaker chassis car examination article, switching value input unit for become data signal with the location State signal conversion of circuit breaker chassis car examination article, the switch quantity output unit for obtain the switch quantity output signal according to the PLC sequential operation result, time management the control unit for carry out the supervisory control to the time information in the process of the test, memory cell for data message to in the process of the test is saved.