The utility model relates to an electric sliding ring of die -casting integrated into one piece formula change oar for aerogenerator, including integrated into one piece's steel core axle, uses the steel core axle as a plurality of copper rings in axle center, and each copper ring pass through welded connection's many temperature -resistant cable lines and filler. The utility model discloses a become the electric sliding ring of oar through whole die -casting integrated into one piece to make not have the gap between each part, have good sealing performance, can not lead to the emergence of electrical accident because of weing, but also controlled the trueness error of product concentricity, can ensure the problem of beating in the product use to get rid of the trouble of striking sparks because of beating, had characteristics such as anti -interference, dampproofing, shockproof, antifungi and concentricity height.