Blade of wind wheel

The utility model discloses a blade of a wind wheel. The blades extend in the front-back direction. Each blade is provided with a leeward side located on the upper side and a windward side located onthe lower side. Intercepting the windward side to form a lower surface molded line and intercepting the leeward side to form an upper surface molded line by using a plane vertical to the left-right direction; wherein the lower surface molded line comprises a lower convex line and an upper concave line, a connecting line of two end points of the lower surface molded line serves as a reference, thelower convex line is in a shape with at least one part protruding downwards, the upper concave line is in a shape with at least one part sinking upwards, and the upper concave line is located on the rear side of the lower convex line. According to the embodiment of the utility model, the blade of the wind wheel has a good noise reduction effect. 本实用新型公开了一种风轮的叶片，所述叶片沿前后方向延伸，且所述叶片具有位于上侧的背风面和位于下侧的迎风面，以垂直于左右方向的平面截取所述迎风面形成下表面型线