The invention discloses a right-angle turning conveying device and its working method, comprising a belt conveyor A and a belt conveyor B, characterized in that: the belt conveyor A and the belt conveyor B are arranged at an angle of 90°, the belt conveyor A and the belt conveyor The intersection of the machine B is provided with a steering gear, the bottom of the steering gear is provided with a pulley unit, one side of the steering gear is provided with a push cylinder, and the belt conveyor A, belt conveyor B, and the steering gear are all provided with motors, The steering gear also includes a frame on which a rotating shaft A and a rotating shaft B are rotatably connected, one end of the rotating shaft A is fixedly connected to the output end of the motor, and the rotating shaft A and the rotating shaft B are evenly spaced A plurality of belt pulleys are sleeved, and a belt is connected between the belt pulley sleeved on the rotating shaft A and the belt pulley sleeved on the rotating shaft B. The purpose of the present invention is to solve the problems of inconvenient loading and unloading, inability of the conveying devices to turn, and inconvenient speed adjustment of the conveying devices caused by the combined use of multiple conveying devices.