The invention relates to a multi-functional dustbin. The multi-functional dustbin comprises a cylinder 1, a connecting block, a rotating shaft, a fixing block, a label 1, a handle, a sewage purifier, a feeding pipe, a plurality of cutting knives and a stirring shaft, wherein an aspirating plate is fixedly connected with a device main body through a connecting plate, and the purifier is fixedly arranged on the rear end surface of the aspirating plate; a hollow plate is fixedly arranged in the device main body, and the hollow plate is located at the left end of a partition board; an electric motor is fixedly arranged on the upper end surface of the hollow plate, the stirring shaft is mounted at the upper end of a main shaft of the electric motor, and the plurality of cutting knives are symmetrically fixedly arranged at the left and right ends of the stirring shaft; an air pump is mounted in the hollow plate; a press rod is mounted at the right end of a cylinder 2, and a compressing plate is fixedly arranged at the right end of the press rod; and the sewage purifier is fixedly arranged in the device main body, and the sewage purifier is located at the right end of the partition board. The multi-functional dustbin can sort garbage, store garbage and carry out purifying treatment on the garbage and can be easily moved.