U-shaped glass has a U-shaped cross section, which enhances the force on the glass and gives it more mechanical strength than flat glass. The installation span is large, no additional support is needed, and a lot of auxiliary building materials are omitted. At the same time, it has the ideal light transmittance and saves the energy consumption of building lighting. Double layer installation has excellent thermal insulation and sound insulation performance; The processing is simple and convenient, suitable for building exterior wall and indoor partition,anti-aging, light resistance.