The exterior wall of a building is the main structure for gray-brick dry wall construction.Iron parts embedded in the exterior wall are welded with vertical galvanized square tubes.Horizontal galvanized angle steels were welded or bolts on the vertical galvanized square tubes,in accordance with the detailed design scheme for the exterior gray-brick dry wall.Then,the gray-brick dry wall was constructed according to the detailed construction drawing of gray brick layout.In order to ensure the stability,safety and reliability of a gray-brick dry wall in the construction process,tie bars were welded on the vertical galvanized square tubes in the wall,and a steel wire mesh was secured with epoxy adhesive on the back to reinforce the wall.This was the construction technology for the exterior gray-brick dry wall.