The invention relates to an electronic waste treating device and a use method thereof. The device comprises a lifter, a feeding groove, a furnace body, an induction furnace, a dust collector, combustion furnaces and a heat exchanger; the furnace body comprises a feeding hole, a feeding section, a combustible gas outlet and a reduction melting section, wherein the feeding hole is formed in the topof the furnace body, the feeding groove is fixedly formed in the feeding hole, the feeding section is connected with the feeding hole, the combustible gas outlet is formed in one side of the top of the reduction melting section, and the feeding section is connected with the reduction melting section; the induction furnace is connected with the reduction melting section; the dust collector is connected with the combustion furnaces and conveys dust to a bag-type dust collector through a fan; and the heat exchanger and the combustion furnaces form an integrated device, and the heat exchanger is arranged above the combustion furnaces. The device has the advantages of being reasonable in structural design, convenient to operate and use and low in maintenance cost, dioxin is not prone to being generated at high temperature, the fly ash yield in the combustion process is small, the waste gas output is effectively reduced, the environment protection is facilitated, and the comprehensive utilization prospect is wide.