The invention provides a novel-structure wind stopping device of a cooling tower of a thermal power plant. The structure of the wind stopping device is of an overlapped type; and the structure can effectively reduce the space occupied by the wind stopping device and the size of an air inlet can be conveniently adjusted according to the change of an outer environment of the cooling tower, so that the air inlet quantity of the cooling tower is changed, and the normal operation of the cooling tower is guaranteed. The wind stopping device is composed of overlapped wind stopping plates, a wind stopping plate supporting device and a steel wire rope power transmission device. The overlapped wind stopping plates are connected into a whole body through a guide rail; the wind stopping device can slide in a supporting structure through using a steel wire rope to transmit power, so that the wind stopping device can properly adjust the size of the air inlet of the cooling tower according to the change of the outer environment to take the wind stopping and anti-freezing effects and guarantee the normal operation of the cooling tower in different seasons.