The invention relates to a photovoltaic power generation LED street lamp, in particular to a dustproof photovoltaic power generation LED street lamp. The dustproof photovoltaic power generation LED street lamp capable of achieving a dustproof effect through wind power is provided. In order to solve the technical problem, the dustproof photovoltaic power generation LED street lamp comprises a lamp pole, an LED street lamp body, a first bearing pedestal, a first rotating shaft, a first gear, fan blades, a second bearing pedestal, a second rotating shaft, a second gear, a cam and the like. The first bearing pedestal is connected to the upper portion of the left wall of the lamp pole in an interference fit mode. The first rotating shaft is connected to a bearing inside the first bearing pedestal in an interference fit mode. The fan blades are symmetrically arranged at the left end of the first rotating shaft. According to the dustproof photovoltaic power generation LED street lamp, optical energy is converted into electric energy to be stored into a storage battery through a solar module, then a power source is provided for the LED street lamp body through the storage battery, and thus the LED street lamp can give out light to illuminate roads at night; and a water collecting tank is used for collecting rainwater.