The utility model relates to a chain transmission device of wind energy, which consists of an upper cover, a lower cover, wind turbines, a draught fan, air inlets, air outlets, a shaft and a base, wherein, a plurality of wind turbines (16) are connected together in series by the shaft (15) inside the upper cover (14) and the lower cover (17) and each wind turbine is separated from each other by clapboards (22); an air inlet (19) and an air outlet (20) are arranged on the upper cover (14) corresponding to the wind turbines (16); an air inlet (23) and an air outlet (24) are arranged on the adjacent lower cover (17). The air outlet (20) and the air inlet (23) are connected with each other and the air outlet (24) and the air inlet (19) are connected with each other; the air outlet (20) or the air outlet (24) is connected with an air inlet of the draught fan. The mechanical wind energy of the draught fan is taken as original kinetic energy and the purposes of improving energy utilization ratio and saving energy are achieved by one shaft with multiple wheel couple type.