Double-layer curtain wall

The utility model discloses a double-layer curtain wall which comprises a plurality of civil engineering main bodies (1) arranged on the outer wall face of a building, connecting steel frames (2) are arranged between the civil engineering main bodies (1), a plurality of vertically-arranged fixing assemblies (3) are arranged on the civil engineering main bodies (1), and each fixing assembly (3) comprises two transversely-arranged rear bottom plates (4) attached to the civil engineering main bodies (1). The rear bottom plate (4) is provided with transversely-arranged galvanized steel corner connectors (5), and the inner sides of the galvanized steel corner connectors (5) on the fixing assemblies (3) of the same civil engineering body (1) are jointly provided with a vertical stand column (6). The inner-layer curtain wall and the outer-layer curtain walls are arranged on the same corner brace, and the outer-layer curtain walls are independently arranged, so that the mounting convenience and the structural strengt