Photovoltaic sun-shading device of building

The utility model discloses a photovoltaic sun-shading device of a building, which comprises glass arranged on an outer wall, a connecting plate is fixed on the outer wall, a plugging plate is fixed at the front end of the connecting plate, cross beams are fixed at the front end and the rear end of the plugging plate, clamping grooves are fixed on the cross beams, and the clamping grooves are fixed on the outer wall. A transversely arranged photovoltaic module is clamped between the two clamping grooves, and a channel is arranged between the cross beam at the rear end of the plugging plate and the glass. Compared with the prior art, the connecting plate, the blocking plate, the cross beam and the clamping groove form the photovoltaic assembly mounting structure, the mounting structure is simple, the photovoltaic assembly is convenient to mount in a clamping mode, and construction on the vertical face of a building is facilitated. And secondly, a channel is reserved between the photovoltaic module and the oute