Light distribution lens of LED streetlamp

The utility model discloses an LED light distribution lens of an LED streetlamp. The light distribution lens comprises a substrate, a light incoming surface and a light outgoing surface, wherein the lower surface of the substrate is provided with an accommodating groove in which an LED lamp bulb is arranged, and the light incoming surface is an inner wall of the accommodating groove; and the upper surface of the substrate is provided with a bulge part, and the light outgoing surface is an outer wall of the bulge part. Because the light outgoing surface and the light incoming surface are distributed at two sides of a second reference surface asymmetrically, eccentric light-distribution can be realized, therefore light in partial illumination areas is more intensive and light in partial illumination areas is weaker so as to accord with the road illumination standard, and the utilization rate of light energy is improved; through reasonable setting of structures of the light incoming surface and the light outgoin