The utility model relates to a panel, in particular to capital construction standard panel, including support body and panel body, the panel body is through rotatable the installing on the support body of a pivot, the support body openly sets up the symmetry and sets up the fixed frame of four rectangles, the frame of fixed frame can be installing on the panel body of 90 degrees upsets, set up an extension spring between each frame and the panel body, the panel body back is dull and stereotyped, the bolt is installed to panel body one side upper end, the installation of homonymy lower extreme is the bolt down, the support body upper portion that corresponds sets up a jack, with last bolt, another side that the bolt is relative down is close to last lower extreme and sets up the pinhole respectively, the support body lower part that corresponds sets up sells with pinhole complex T shape. The utility model discloses can make things convenient for quick changing and demonstrate the file, use in a flexible way, increase usable floor area.