The invention discloses equipment for biodegrading and environmentally treating kitchen wastes. The equipment is characterized by comprising a housing, a waste container lifting device mounted on one side of the housing, a feeding device mounted at the upper part of the housing, an extruding device mounted in the housing, a grinding device mounted in the housing, a fermenting device mounted in the housing, and an electric control device used for controlling the waste container lifting device, the feeding device, the extruding device, the grinding device and the fermenting device. Due to the adoption of the structure, the equipment has the characteristics of high automation level, small size, high handling capacity, convenience for operation, labor saving, energy conservation, environmental protection and the like, can be used for treating the kitchen wastes produced by 300-500 persons within 24 hours and producing 150-200 kg of organic fertilizers with the water content not more than 25%.