Short process flow, convenient operation, no pollution, low energy consumption, low cost and strong adaptability; Can deal with high and low content of various electronic waste; Simple equipment, less investment and easy realization of continuous industrial production; The metal recovery rate is high. If the gold and platinum purifying agents in this process are used, the purity and recovery rate can reach 99.99%. The waste residue extracted from e-waste can be mixed with sand and gravel in a certain proportion to make slag bricks, wall building materials, or PCB boards ground into powder to make handicrafts, and no solid waste is discharged.