Metal curtain wall veneer with back rib reinforcing structure

The utility model provides a metal curtain wall veneer with a back rib reinforcing structure, which comprises a metal panel, a fixed welding nail, a square tube reinforcing rib and a corner connector, the periphery of the metal panel is bent backwards to form a side plate vertical to the front surface of the metal panel; the square tube reinforcing ribs are arranged on the periphery and the middle portion of the back face of the metal panel respectively, fixing welding nails are arranged on the positions, where the square tube reinforcing ribs are located, of the back face of the metal panel, penetrating holes corresponding to the fixing welding nails are formed in the square tube reinforcing ribs, and the fixing welding nails penetrate through the corresponding penetrating holes and are locked through nuts. Each square tube reinforcing rib is fixed with the metal panel; one end of each corner connector is fixedly arranged on a square tube reinforcing rib located on the periphery of the metal panel, and the c