The invention relates to an energy saving lamp. In detail a high-power LED energy saving lamp is provided, comprising lamp cover, LED light source and lamp head. The invention adopts high-power LED as the light emission source. The lamp head, which is a integration with two closed ends, comprises main body of lamp head, insulator and soldering tin. The quantity of heat generated by LED light source can be solved effectively by convex rib in light head, heat dissipation hole and shell of main body of lamp head. Phosphor layer is coated on the inner wall of lamp cover. By the neck on the main body of lamp head and the port of lamp cover the unscrewing structure is formed. The lamp cover is fixed with lamp head in connection. The invention can be widely applied in interior and exterior decoration, illuminance, traffic and safety display so on.