The utility model relates to a high -efficient belt cleaning device of big polar plate belongs to the surperficial effective clean processing technique field of zinc hydrometallurgical process target board, high -efficient belt cleaning device of big polar plate include wash tub pipe I, down wash tub pipe I, go up wash tub pipe II, wash tub pipe II, nozzle, preceding ratchet, preceding mounting panel, back ratchet, back mounting panel down, the utility model discloses a wash tub pipe and ratchet are installed on the parallel facade of negative plate motion, and the wash tub pipe bilateral symmetry distributes in the ratchet both sides, can carry out multiple installation according to the nature of the height of negative plate and attachment, the clearance degree of difficulty etc. And installation multiunit multilayer wash tub pipe and ratchet are on messenger's negative plate in, lower each position can effectively be washed. Furthermore, the utility model discloses simple structure is convenient for reform transform, and energy -conservation, water conservation, safety, environmental protection are washed efficiently, wash the high quality.