Compression testing machine with buffer device

The utility model relates to the technical field of compression tests, and provides a compression testing machine with a buffer device, which is convenient for simultaneously carrying out compression test comparison on two materials with the same specification from different manufacturers, is time-saving and high in practicability, and comprises a test box, a motor is arranged on the test box, and a buffer device is arranged on the motor. Screw rods are rotatably connected to the inner bottom wall and the inner top wall of the test box, the spiral directions of the two screw rods are the same, rotating shafts are fixedly connected to the opposite sides of the two screw rods, an output shaft of the motor penetrates through the test box to be provided with a driving trapezoidal gear, and driven trapezoidal gears are installed on the two rotating shafts; the two auxiliary trapezoidal gears are meshed with the main trapezoidal gear, the two screws are meshed with sliding plates, the sliding plates are in sliding