A convection radiator of a high-power LED lamp resolves the technical problem of increasing the radiating efficiency of the high-power LED lamp, and simultaneously reducing material consumption and reducing wind resistance, and the technical scheme comprises that a mounting groove of an LED lamp plate is arranged on one lateral face of a radiating plate body of the convection radiator of the high-power LED lamp, a group of radiating embossments are arranged on the other lateral face of the radiating plate body, auxiliary radiating plates are arranged on two sides of the mounting groove of the radiating plate body, and a group of auxiliary radiating embossments are arranged on the auxiliary radiating plate. Air convection holes are arranged among the auxiliary radiating embossments arranged on the auxiliary radiating plate. The convection radiator of the high-power LED lamp has the advantages of simple structure, convenient processing, beautiful appearance, guaranteeing the radiating of the high-power LED lamp when using by the natural wind and the formed air convection, increasing the service life of the high-power LED lamp, reducing the material consumption, reducing the product weight, reducing the wind resistance, and increasing the using safety.