Fabricated double-layer grating curtain wall structure

The utility model discloses an assembly type double-layer grating curtain wall structure which comprises an inner-layer curtain wall and a stone grating curtain wall arranged on the outer side of the inner-layer curtain wall and further comprises a plurality of installation base bodies connected with a main body structure, and each installation base body comprises a bracket and a hanging base arranged at the outer end of the bracket. The bracket is fixedly connected with the inner-layer curtain wall located on the outer side of the main body structure, the inner-layer curtain wall comprises mounting keels and curtain wall plates arranged on the outer sides of the mounting keels, the mounting keels comprise transverse keels and longitudinal keels, and the upper end and the lower end of each longitudinal keel are connected with the bracket; the stone grid curtain wall is formed by splicing a plurality of grid units, each grid unit comprises a unit framework and a grid plate arranged on the periphery of the unit