The present invention relates to a building wall surface and its making method. The invented building wall surface includes inner lining layer which is made of foamed plastics and fixed on the wall body by utilizing fixing components or adopting sticking process and external covering layer connected on the described inner lining layer, the described external covering layer is formed from several external covering layer small blocks which are arranged and fixed on the described inner lining layer surface. Besides, said invention also provides the concrete construction method and steps for making said building wall surface. |