The invention discloses a remelting device for waste copper reutilization. The remelting device comprises a melting furnace, a stirring mechanism, a pulverizing mechanism, a display screen, a controlplate, an electromagnetic valve, a discharging pipe, first supporting legs, a box door, a feeding port, a filter net, a dirt outlet and a heating mechanism. The first supporting legs are fixed to thefour corner positions of the bottom of the melting furnace through welding. The display screen is embedded and installed in one side of the melting furnace. The control plate is embedded and installedin one side of the display screen. The discharging pipe is arranged at the bottom of the melting furnace, and the connecting position of the discharging pipe and the melting furnace is provided withthe electromagnetic valve. The heating mechanism is embedded and installed in the inner wall of the bottom of the melting furnace. The stirring mechanism is arranged on the inner wall of the top of the melting furnace. The filter net is fixed to the center position in the melting furnace through bolts, and the filter net makes contact with the bottom of the stirring mechanism. A dirt outlet is formed in the side, close to the filter net, of the melting furnace, and provided with the box door. According to the remelting device, usage convenience can be effectively improved, and rapid waste copper recycling is convenient.