The invention provides a high-power LED street light which can be simultaneously provided with one or two LED light source modules, being composed of a heat transfer and dissipation system, a luminescence and light distribution system, a power source transformation system and a lamp shell, wherein, the heat transfer and dissipation system consists of a heat conducting substrate of the LED light source module, a heat conducting adhesive and a radiator integrated with an upper shell; the luminescence and light distribution system consists of the luminous surface of the LED light source module, a sealing ring, a reflecting shade, a light distribution lens and a transparent lampshade; the power source transformation system consists of a power source incoming line, a rectification drive controller, a power source outgoing line as well as the positive and negative terminals of the LED light source module. The structure of the invention can effectively enhance the luminous intensity of a single lamp, simultaneously, the radiating structure of the lamp is more beneficial to heat dissipation, which causes an LED chip to work under the appropriate temperature environment, thus achieving the aims of prolonging the service life of the lamp and reducing the photodegradation of the lamp.