The utility model discloses a novel LED lamp heat radiation structure, including heat expansion board and radiator, the one side of heat expansion board is equipped with bellied heat dissipation pipeline, and the another side is the plane, form three -dimensional notch plate after the heat expansion board is bent, its one side that is equipped with protruding heat dissipation pipeline inwards, the plane sets up outwards, the lamp plate is connected to the bottom of heat expansion board, it sets up the radiator to connect on the both sides plane of heat expansion board. The utility model discloses increase by a heat expansion board between lamp plate and radiator to making three -dimensional U type form with the heat expansion board, fixing the radiator at the both sides of heat expansion board face, the lamp plate is installed in the bottom surface of heat expansion board, and the medial surface on the heat expansion board is equipped with the heat dissipation pipeline, and greatly increased heat radiating area under the circumstances that keeps the original volume of LED provides the radiating effect.