Abstract: A self-cleaning cat litter box is provided which consists of a housing having a floor, side walls, and end walls with an open top, so that a cat can enter. A platform is pivotally mounted at one end proximate one of the end walls of the housing, so that the cat can squat thereon and defecate. A mechanism, activated by the weight of the cat on the platform, is for lifting the platform up on an angle, spraying water upon the platform and lowering the platform back to its original position after the cat leaves the platform. A drain is located at the pivoted end of the platform to carry the waste water therefrom. A mechanism is fluidly connected to the drain for liquefying any solid waste within the waste water so that all of the waste water can be flushed out.