The invention provides a chain belt magnetic separation device. The chain belt magnetic separation device comprises a main body bracket, a washing device, a magnetic field generator, a material box and a chain belt, wherein a driving gear, a driven wheel and a steering wheel are arranged on the main body bracket; the chain belt is arranged on the driving gear, the driven wheel and the steering wheel; the main body bracket is provided with the magnetic field generator; the magnetic field generator is internally provided with a magnetic cavity; the main body bracket is provided with a motor; the motor is provided with a speed reducing wave box; the speed reducing wave box is provided with a driving shaft; the driving gear is arranged on the driving shaft and is arranged on one side of the upper end of the main body bracket; the steering wheel is arranged at the lower end of the driving gear; and the driven wheel is arranged on the opposite side of the driving gear on the main body bracket. With the adoption of the chain belt magnetic separation device, continuous work can be realized; and the chain belt magnetic separation device has the advantages of low energy consumption, great handling capacity, simple structure and low utilization cost, and can work continuously.