The invention discloses a kitchen waste disposer. The kitchen waste disposer comprises a rack body, a cylinder lifting and turning device, a switching door cover, a material hopper, a crushing device, a solid-liquid separating device, a squeezing and lifting device, a fermenting and drying device and an oil-water separating device, wherein the cylinder lifting and turning device, the switching door cover, the material hopper, the crushing device, the solid-liquid separating device, the squeezing and lifting device, the fermenting and drying device, and the oil-water separating device are commonly arranged on the rack body. The kitchen waste disposer provided by the invention can sequentially carry out crushing operation and solid-liquid separation operation on kitchen waste, and further carries out squeezing and dehydration operation on solid kitchen waste, fermenting and drying operation on the solid kitchen waste, and oil-water separation operation on liquid kitchen waste, so that the continuous feeding and continuous discharging production process of the kitchen waste disposer can be realized, and the production efficiency is high. The entire kitchen waste disposer is conveniently, intensively and intelligently controlled, and is particularly applicable to kitchen waste disposal in fields in a small-scale area, such as hotels and restaurants.