An LED heat dissipation structure includes a heat sink, a cover plate, and an air blowing device. The heat sink has fins. Gaps between the fins form a plurality of continuous air flow channels, and air discharge ends of the air flow channels (16) extend to a peripheral surface of the heat sink. The cover plate covers the fins, closes openings of the airflow channels at tip portions of the fins, and partially bulges and forms an air inlet chamber communicating with the air flow channels. The air blowing device forcibly blows air into the air inlet chamber.