The invention discloses a domestic waste treatment device which comprises a long waste sorter, a beater, a double-deck screen separator, a conveying device, a winnower blast blower and shredding equipment. Long waste and short waste are separated and shredded by the long substance sorter and the beater, the short waste enters the double-deck screen separator, the long waste enters the winnower blast blower, fine granular waste is separated to the conveying device by sieving the short waste which passes through the double-deck screen separator, the separated large granular waste also enters the winnower blast blower, heavy waste, light waste and heavier waste are separated by the winnowing of the winnower blast blower, and then the heavier waste is shredded by the shredding equipment, separated by the double deck screen separator and separated in a winnowing way so as to thoroughly separate the heavy waste, the light waste and the heavier waste. The invention thoroughly separates the waste, small materials can be used for feeding earthworms, the heaviest materials such as bricks, stones and batteries can be separated and utilized again, and other moist waste and corrodible waste can produce marsh gas and fertilizer, thereby the invention sufficiently utilizes the waste, saves the area for burying the waste of a waste landfill, has no air, earth and groundwater pollution, protects the living environment of human, and reduces the cost of waste treatment.