The feeding conveyor will evenly transport the circuit board to the crushing knife box of the double shaft crusher, the alloy steel cutter will pre-crush the circuit board, and then enter the crusher to crush the material to less than 3mm-5mm, and the crushed material will be separated from copper powder through the airflow sorting machine. The dust sucked away by the pulse dust collector contains a small amount of metal powder, and then sent to the electrostatic separation equipment by the wind loader for the next step in the separation of trace copper powder and resin powder.