The utility model discloses a purification groove of zinc sulphate solution replacement edulcoration belongs to wet process zinc metallurgy technical field. Purify the groove and include the feed liquor pipe, purify the groove cell wall, purify the groove tank bottom, purify capping board, mixer, exhaust column, drain pipe, still include the filter plate, the filter plate is established inside the cell body of purification groove the below of stirring rake the top of drain pipe, be equipped with the filtration pore on the filter plate, the zinc plate is equipped with on the filter plate. The utility model discloses not only can effectively displace the copper and cadmium cobalt impurity ion among the zinc sulphate solution, and can reduce the zinc plate volume that replacement copper and cadmium cobalt impurity consumed by a wide margin, reduce replacement edulcoration cost, also can obtain the copper and cadmium cobalt sediment of higher purity, can also improve the production site environment.