The invention discloses a treatment device of household garbage incineration. The device comprises a cutting box, a cutting knife, a rotating shaft, a cutting motor, a feeding pipe, a heating cavity,a water outlet, an incinerator, a transmission motor, a feeding rod, crushing rolling wheels and a feeding box, wherein the crushing rolling wheels are arranged in the feeding box, the feeding rod isarranged below the crushing rolling wheels, the right side of the feeding rod is connected with the transmission motor, the cutting box is connected to the left side of the feeding box, the rotating shaft is arranged in the cutting box, and the cutting knife is arranged on the rotating shaft; and the lower end of the rotating shaft is connected with the cutting motor, the feeding pipe is arrangedat the right lower end of the cutting box, the right end of the feeding pipe is connected with the incinerator, the heating cavity is formed in the outer side of the incinerator, and the water outletis formed in the left lower end of the heating cavity. According to the device, the heat generated by incineration in the incinerator is used for heating water flow in the heating cavity, so that thedomestic water for residents can be supplied, and therefore heat energy generated during the incineration is fully utilized; and meanwhile, the environment is protected by the absorption and utilization of the incineration heat as well.