Building decoration is with (window) curtain of adjustable width

The utility model discloses a building decoration is with (window) curtain of adjustable width, include: a casement, including a top, one connects the portion of holding court from behind a screen attop, and one connect in the top borders on the compound layer of the portion of holding court from behind a screen, compound layer is including a plurality of being located the top is neighbouring a section of sewing up of one end of holding court from behind a screen to and a plurality of settings are in form the trepanning that the interval set up between the section of sewing up, each the trepanning orientation the portion of holding court from behind a screen is open, and an at least connecting piece, including a main part, a plurality of edges the inserted bar that the main part is extended towards same orientation, and a connection the couple of main part, the inserted bar closely spaced in the interval of trepanning, inserted bar accessible some is adjacent the trepanning. The utility model discloses a case