Solar floodlighting system of building

The utility model relates to a solar floodlighting system of a building, which comprises a photovoltaic power generation device arranged at the top of the building, a floodlighting lamp arranged on a curtain wall of the building and a cleaning device used for cleaning the floodlighting lamp, and the cleaning device comprises a collecting box, a water storage box and a water spraying assembly, an opening is formed in the upper end of the collecting box and is in a flaring shape, the water storage tank is arranged on one side of the collecting box and communicates with the water storage tank through a water pipe, and the water spraying assembly is arranged on the peripheral side of the floodlighting lamp and communicates with the water storage tank through a water conveying assembly. A water outlet of the water spraying assembly faces the mirror face of the floodlighting lamp. The floodlighting lamp has the effect of automatically cleaning the mirror surface of the floodlighting lamp. 本申请涉及一种建筑物的太阳能泛光照明系统，其包括设置