The invention discloses a new structure of an LED street lamp. The new structure of the LED street lamp mainly comprises a lamp post mounting rack, an elevation angle module fixing rack, LED light source modules, a heat radiation shell and a driving power supply, wherein the heat radiation shell is provided with four mounting base surfaces. The invention is characterized in that the lamp post mounting rack is movably connected with the elevation angle module fixing rack, the four mounting base surfaces are symmetrically installed at both sides of the lamp post mounting rack and the elevation angle module fixing rack and are movably connected with the lamp post mounting rack and the elevation angle module fixing rack, each mounting base surface is provided with a row of the LED light source modules, and the LED light source modules are driven by the driving power supply. The new structure of the LED street lamp realizes that the irradiation directions at the elevation angle and the horizontal angle of a lamp holder can be conveniently regulated in the mounting process of the street lamp, thereby being capable of achieving the optimal lighting effect for different road widths, lamp post heights and lamp post intervals.