The utility model discloses a blunt tail edge wing section of heavy gauge device of making an uproar falls, personally experience sth. Part of the body including the blunt tail edge body and zigzag tail edge, the blunt tail edge body and zigzag tail edge body coupling, zigzag tail edge are personally experienced sth. Part of the body including last sawtooth part and lower sawtooth part, go up sawtooth part and are connected with fixed plate body, and fixed plate body and lower sawtooth part are connected, and fixed plate body passes through the bolt fastening on the tail edge plane of the blunt tail edge body. The utility model discloses a fixed zigzag tail edge body on the tail edge plane of the blunt tail edge body not only can improve the aerodynamic characteristic of the blunt tail edge wing section of heavy gauge, and the vortex of wing section effectively blocks and cuts apart when great to incoming flow turbulence intensity, moreover can be at the pneumatic noise of the blunt tail edge wing section of greatly reduced heavy gauge, promote that blade wind energy utilization is rateed and the operating stability of wind energy conversion system, the utility model discloses structural design is simple, easily installs and uses widely.