The invention relates to a household refuse comprehensive sorting machine and a working method thereof. The household refuse comprehensive sorting machine is characterized by comprising a feeding belt, a bag breaking device, a winnowing device, an axial flow fan, multiple stages of refuse collection hoppers, refuse belts and a protective cover. The working method of the household refuse comprehensive sorting machine includes the steps that a control system controls start of the axial flow fan and the multiple refuse belts and controls start of the winnowing device, in other words, a front screen drum and a back screen drum are controlled to rotate; and the control system controls start of the feeding belt and put of raw refuse, the raw refuse is ground and smashed through the bag breaking device, and the smashed refuse enters the front screen drum and the back screen drum, and is subject to winnowing in sequence through the axial flow fan to enter the multiple stages of refuse collection hoppers. According to the different proportion and different grain sizes of the household refuse, the screen drums and the wind action are used in the household refuse comprehensive sorting machine for effectively sorting the household refuse, and the sorting efficiency is greatly improved.