Laminated glass is made of two or more than glass with one or several PVB through pressuring and heating. Light penetration of PVB membrane in glass coefficient approaches glass itself, so the sandwich glass can be pure and transparent as ordinary glass. After the glass is broken, its chips are still all glued on PVB membrane, so it is a kind of safe glass. Different PVB membrane can produce different kinds of sandwich glass including glass for antiultraviolet, defending X ray, defending electromagnetic wave, firing prevention. The sandwich glass is safe, unharmful, free from color-fasting, so it is suitable for various kinds of windows and skylights, windows for vehicle and ship, for window and shelf for exhibition, in other special occasion for bulletproof and anti-riot.