The invention relates to a cooling device, in particular to a water flow alternation type cooling device for a cooling tower. The water flow alternation type cooling device for the cooling tower can recycle water. According to the technical scheme, the water flow alternation type cooling device for the cooling tower comprises a base, a supporting frame, a box body, a fan, filler, a rotating mechanism and a storage mechanism, the supporting frame is arranged at the top of the base, the box body is arranged at the top of the supporting frame, the filler is arranged in the middle of the inner wall of the box body, the fan is connected to the middle of the top of the box body, the rotating mechanism is arranged on the box body, and the storage mechanism is arranged between the box body and the rotating mechanism. Through cooperation of the rotating mechanism and the storage mechanism, water flow in a water storage tank is pumped into a first water tank, then the water flow drips onto the filler through a rotating spray head, in the way, the filler is wetted, and the draught fan operates.