The utility model relates to a heat radiation structure of high -power LED lamp, including radiator, power storehouse with locate the inside baffle in radiator and power storehouse, the radiator be adie -casting aluminium integral type structure, and the radiator includes that A circular base and vertical and annular distributes in the fin of base surface outer fringe, and the even interval distribution of fin is on the base, and the fin outside be the arcuation, the inboard inclined plane that be, and the angle of this inclined plane and base be the obtuse angle and just locates the extension to the base is central, the power storehouse is the loudspeaker form, and its bottom and the laminating of radiator top, power storehouse are close to the wind -guiding mouth that radiator department was equipped with a plurality of evenly distributed, and the wind -guiding mouth is in the below at baffle top, and the clearance of wind -guiding mouth between corresponding to the fin distributes.The utility model discloses great promotion die -casting aluminum heat sink one's heat -sinking capability, the effectual life -span that promotes LED high -power lamp, reduce the aluminum componentcost -effective while of weight, can be quick derive the inside accumulational heat source of die -casting aluminium.