The invention discloses a large-range uniform light distributing method for an LED high-pole lamp. The LED high-pole lamp comprises a lamp body and a mounting support, the mounting support is provided with an adjusting device used for adjusting irradiation angle of the lamp body, various lenses of different light beam angles can be mixedly used in the lamp body for secondarily distributing light, and the lenses symmetrically distribute light transversely in the irradiated area, and the transverse light beam angle is not smaller than the ratio of the irradiation angle to the number of the lamps, and light emitted from two transversely adjacent lamps on the same high-pole lamp can be stacked transversely in the irradiated area. Longitudinally, the lenses asymmetrically distribute light, and outgoing light can form a mutually stacked equal irradiation surface within the irradiated area, so that power ratio among the lenses of the lamps can be adjusted so as to enable light intensity of the equal irradiation surfaces to be consistent, and large-range uniform light distribution is realized.