The invention relates to a waterless automatic closestool cleaned by the powder flushing method. The closestool includes a closestool frame, the left end of the closestool frame is of a hollow frame structure, the middle of the closestool frame is of an opening structure which is inclined downwards, the downwards inclined opening structure helps stool sticky solids to fall off by using the own gravity, the right end of the closestool frame is of an L-shaped structure, the right end of the closestool frame is a seat on which a user can sit to defecate, the structure is ingenious in design, the left end of the closestool frame is internally provided with a powder tank, the power tank is used for placing dust, the upper end of the powder box is connected with a power discharge channel, the tail end of the power discharge channel is connected with a powder spray pump, and the powder spray pump is installed on the upper side of the middle of the closestool frame. According to the waterless automatic closestool, the stool is cleaned away by the powder physical and chemical method, powder rapidly wraps the falling stool sticky solids, no residual stool sticky solids are left, the surface of the closestool can be kept clean and new, the powder can be degraded, the environmental protection performance is good, powder single consumption is extremely low, and the practicability is good.