Double glass curtain wall

The utility model provides a double glass curtain wall. The double glass curtain wall comprises an outer layer of glass and an inner layer of glass, wherein a plurality of horizontal strips are connected between the outer layer of glass and the inner layer of glass; the double glass curtain wall further comprises a plurality of stretching membranes; a fixed leg is arranged in the center of each stretching membrane; the fixed leg fixes each stretching membrane on each horizontal strip through a fastening piece; at least three retractable connecting pieces are arranged on a surface on which each stretching membrane is opposite to the inner layer of glass; one end of each retractable connecting piece is fixed on the outer end surface of each stretching membrane; the other end of each retractable connecting piece is located at the fixed leg part of each stretching membrane; at least two panel joints are arranged on each retractable connecting piece; the sectional area of each retractable connecting piece is gradu