The invention provides a double-channel exchange type feeding system comprising a material supplying device, a bulk waste continuous feeding device, an overall-bucket feeding device and a control system. The bulk waste continuous feeding device, the overall-bucket feeding device and the control system are connected with the feeding device. The material supplying device comprises a tubular cylinder, a waste receiving and smashing mechanism and a waste pushing mechanism. The two ends of the tubular cylinder are connected with the waste pushing mechanism and a smelting furnace correspondingly. A first discharging valve is arranged inside the smelting furnace and is close to one side of the smelting furnace. The cylinder wall is provided with the waste receiving and smashing mechanism. The waste receiving and smashing mechanism comprises a material receiving hopper and a smasher, wherein the material receiving hopper are connected with the bulk waste continuous feeding device, the overall-bucket feeding device and the tubular cylinder and provided with a second discharging valve, and the smasher is located between the tubular cylinder and the second discharging valve. The waste pushing mechanism comprises a motor, a transmission assembly and a pushing rod located inside the tubular cylinder and can axially extend and retract back and forth. The control system controls the motor to be started or stopped and controls the first discharging valve and the second discharging valve to be opened or closed. By the adoption of the double-channel exchange type feeding system, through the combination of the advantages of two feeding manners, the feeding speed, the feeding stability and the feeding continuity are improved.