The invention relates to a solar street lamp, in particular to a multifunctional solar street lamp for keeping out rain. The multifunctional solar street lamp for keeping out rain integrates multiple functions, and the service life of solar panels can be prolonged. The multifunctional solar street lamp for keeping out rain comprises a lamp support, LED lamps, lamp posts, connecting rods, the solar panels, blowing devices and the like. The lamp support is arranged on the ground, and the blowing devices are arranged at the lower part of the lamp support; a storage battery is arranged in the lamp support, the lamp posts are symmetrically arranged on the upper part of the lamp support, the connecting rods are arranged at the upper ends of the lamp posts, and the solar panels are connected to the upper ends of the connecting rods; and the LED lamps are arranged at the bottoms of the lamp posts, and a rain shielding device is arranged at the upper end of the lamp support. The multifunctional solar street lamp for keeping out rain has the effects that the service life of the solar panels is prolonged, and multiple functions are integrated; and in hot weather, the blowing devices can blow air to people around the street lamp to dissipate heat, and in rainy days, rain can be kept out.