The invention relates to a wear simulation test bed for the bottom pintle friction pair of a miter gate. A vertical frame is installed on a base. A door frame is arranged on the side face of the vertical frame. The bottom end of the door frame is fixed on the base. A gate body is hinged to the vertical frame. The outer end face of the gate body is in contact fit with the door frame through a checkblock. One side of the gate body is provided with a gate hoist for opening and closing the miter gate. The other side of the gate body is provided with a damping device. The top of the gate body is provided with a suspension device which synchronously rotates with the gate body. The suspension device is arranged right above the gate body. A loading device is installed between the suspension device and the gate body. The top of the gate body is hinged to the rotating shaft. The top of the rotating shaft is in rotating fit with a top pintle installed on the gate body. The bottom of the gate body is supported on a bottom pintle through a bottom pintle support. By means of the test bed, the influences of different loads of the miter gate, different speeds of the miter gate, different lubricating modes of the miter gate and different materials of the bottom pintle friction pair on the frictional wear of the bottom pintle can be simulated.