Self-cleaning building intercom system

The utility model relates to a building intercom system capable of self-cleaning, which comprises an outdoor unit body and is characterized by further comprising a shading cover, a lifting driving mechanism, an ultraviolet germicidal lamp and a brush assembly, the lifting driving mechanism is arranged on the outdoor unit body, the shading cover can be vertically arranged on the outdoor unit body in a sliding mode, and the ultraviolet germicidal lamp is arranged on the outdoor unit body in a sliding mode. The shading cover covers the front wall of the outdoor unit body, the shading cover is further in driving connection with the lifting driving mechanism, the ultraviolet sterilization lamp is arranged on the inner wall of the shading cover and irradiates the front wall of the outdoor unit body, and the brush assembly is arranged at the lower end of the shading cover. And the brush part of the brush assembly is in contact with the front wall of the outdoor unit body. The building intercom system not only can ge