The utility model relates to an axial pumping device or system, in particular to an over-wind guiding treatment device of a fan, which comprises two parallel ventilation ducts, wherein, each ventilation duct is provided with fans with the same quantity. The utility model is characterized in that the device also comprises a liaison channel which is connected and communicated with the two parallel ventilation ducts; a baffle board is arranged in the middle of the liaison channel; and the liaison channel can be communicated or closed by the opening and closing of the baffle board. The utility model has the advantage that the baffle board is arranged in the liaison channel of the fan system according to the over-wind guiding principle of the fan, when the fan has the over-wind guiding phenomenon, the baffle board is operated to close the liaison channel or adjust the ventilation quantity of the liaison channel, the over-wind guiding source is cut off, and the technical problem of the over-wind guiding of the fan is solved.