LED street lamp with fine radiation effect

The utility model discloses an LED street lamp with fine radiation effect, which comprises a casing, an LED light source module and an installation board. The LED light source module and the installation board are arranged inside the casing, the LED light source module is disposed on the lower face of the installation board, radiating fins are arranged on the upper face of the installation board, the casing includes an outer casing with a containing zone having an downward opening, and an upper cover covering the outer casing, both the outer casing and the upper cover are provided with radiation holes, heat generated by the LED light source module is transmitted to the installation board and then transmitted from the installation board to the radiating fins, the radiation holes on the outer casing and the upper cover guarantee air ventilation inside the casing and realize heat exchange between the air inside the casing and air outside the casing, and heat of the radiating fins is quickly dissipated to outside. The LED street lamp is fine in radiation effect, and can prolong service life.