The invention provides a coating rinsing device. The coating rinsing device comprises semicircular a rinsing tank, a rotating screw conveyor and a stirring unit. The rinsing tank comprises rinsing tank bodies in two types, the rinsing tank body in one type is provided with a small weep opening in the bottom, the rinsing tank body in the other type is provided with no opening, the rinsing tank body provided with the opening and the rinsing tank body provided with no opening are alternately connected end to end in series to form a complete semicircular rinsing tank, and one rinsing tank body provided with the opening and one rinsing tank body provided with no opening are combined to form a primary rinsing unit. The coating rinsing device replaces previous heavy manual labor. A conveying screw conveys coating forwards until the coating automatically falls into a container at the end of the rinsing tank. The rinsing tank is separated into individual closed space through screws, so that the coating at the front position and the coating at the rear position cannot be mixed. The stirring unit replaces manual stirring to achieve the stirring of the coating. A scraping plate stirs and scraps off coating blocking the weep opening at the same time when a screw shaft rotates. The clean water in a secondary water storage tank is used for a primary unit for saving water.