Wind power impeller

The utility model discloses a wind power impeller. The wind power impeller comprises blades and a hub, wherein the blades and the hub are mounted in a matched mode through flanges; an extension section is integrally formed on the front side of the hub; a pull ring is arranged on the extension section; a spring is arranged between the pull ring and the rear portion of each blade; the springs are attached to the surface of the hub; the two sides of the pull ring are provided with limit rings; the limit rings are directly welded to the extension section. According to the wind power impeller, when the wind scale is large, blade tips of the blades are bent but will not be bent excessively under the action of supporting beams in the blades and the springs outside the blades; besides, the surface, close to a tower, of each blade is arranged to be a smooth inwards-concaved surface, so that the blades are protected, and the possibility that the blades collide with the supporting tower is lowered structurally.