The invention discloses a tree cleaning device and relates to the technical field of environment protection equipment. The tree cleaning device comprises a water tank body, a pump, sprinkler heads, filter screens and a filter tank; the filter tank is installed at the lower end of the water tank body; the filter screens are correspondently arranged at the bottom of the water tank body and at the two ends of the filtering basin; the pump is installed in the water tank body; the sprinkler heads are installed at the top of the water tank body; and the pump is connected with the sprinkler heads. The water tank body is of a circular ring structure with the open upper end and the open lower end, and trees can be completely cleaned conveniently. The water tank body is of a C-shape structure and can be applied to trees with different diameters conveniently. The filter tank is of a circular ring structure with an open upper end, and trees can be completely cleaned conveniently. The tree cleaning device has advantages that the structure is simple, dust on the trees can be effectively removed, and the road surface is not polluted.