LED (light emitting diode) lens and lens module thereof

The invention discloses an LED lens and a lens module thereof. The LED lens comprises a light scattering unit, a reflecting unit and a base, wherein the profile of the outer surface of the C0-180 section of the light scattering unit is hemispherical or similarly hemispherical; the profile of the inner surface of the C0-180 section of the light scattering unit is conical or similarly conical; the profiles of the outer surface and the inner surface of a C90-270 section of the light scattering unit are asymmetric; the reflecting unit is positioned on one side of the light scattering unit; the LED lens is provided with an inner cavity; the surface of the inner cavity is the inner surface of the LED lens; the vertex of the outer surface of the light scattering unit is vertically aligned with the vertex of the inner surface of the LED lens; and the LED lens module consists of a plurality of LED lenses. By the illumination function of the LED lens, asymmetric batwing light distribution applicable to street illumination can be realized, total reflection of the surface of the lens is effectively reduced, a plurality of light rays can exit at one step and illuminate the area of a road surface, and the use ratio on luminous flux of illumination can be increased.