The invention relates to a spray tower with the function of cleaning the packing layer, which includes a body, a water pipe, a packing layer and a water pump, and also includes a spraying mechanism, a cleaning mechanism and a sewage discharge mechanism. The cleaning mechanism includes a first support rod and a knocking block , a first transmission rod, a second transmission rod, a first drive assembly and two springs, the blowdown mechanism includes a second drive assembly, a second support rod, a moving block, a connecting rod, a scraper and a blowdown assembly, which has In the spray tower with packing layer cleaning function, the packing layer is beaten by the cleaning mechanism, and the dirt in the packing layer is cleaned out under the action of inertia, and the packing layer is sprayed by the spraying mechanism, thus realizing the cleaning of the packing layer. The cleaning of the packing layer can be kept clean, thereby improving the purification effect of the spray tower. Not only that, the sludge deposited in the spray tower is cleaned through the sewage discharge mechanism, which not only improves the efficiency of cleaning sludge in the spray tower, It also prevents sludge from clogging the sewage outlet.