The invention discloses an LED flood light and a manufacturing method thereof. The LED flood light comprises a light body, a PCB, a plurality of LED chip sets and a secondary light distribution structure; the secondary light distribution structure is fixedly arranged on the light body, and a cavity is formed between the secondary light distribution structure and the light body; the PCB is fixedly arranged on the light body and located in the cavity; all the LED chip sets are fixedly arranged on the PCB; the secondary light distribution structure is provided with a plurality of lenses, each lens corresponds to one LED chip set, and each LED chip set comprises at least an LED chip. By adopting the technical scheme of the LED flood light, the lenses are prevented from being separately arranged by arranging the secondary light distribution structure; accordingly, the glue usage mount is greatly decreased, the influence that a glue filling mode serves as a waterproof mode is reduced, the too long cooling time can be avoided, and the extremely high application value is achieved.