Decorative background wall

The decorative background wall comprises a background outer wall body, a wall body inner cavity is formed in the background outer wall body, an outer wall decorative window frame opening is formed in the middle of the background outer wall body, a decorative inner wall plate is arranged in the wall body inner cavity, and the lower end of the decorative inner wall plate is in contact connection with the bottom of the wall body inner cavity in a relative movement mode. A plurality of interior wall decoration window frame openings are formed in the decoration interior wall plate, decoration plate parts are arranged in the interior wall decoration window frame openings, and the interior wall decoration window frame openings are moved to the exterior wall decoration window frame openings to be displayed by moving the decoration interior wall plate. The combined decorative background wall provided with the background outer wall body and the decorative inner wall plate which can move relatively is adopted, and the c