Sound insulation building decoration wall

The utility model discloses a sound insulation building decorative wall, which relates to the technical field of decorative wallboards and comprises a fixing frame, a plurality of first mounting plates are arranged at one end of the fixing frame, second mounting plates are arranged on one sides of the first mounting plates, and a plurality of second fixing plates are fixed at one ends of the second mounting plates. Inserting grooves are formed in one end of the fixing frame and one end of the second fixing plate, two clamping grooves are formed in the inner wall of each inserting groove, and a plurality of first fixing plates are fixed to one end of the first mounting plate. According to the utility model, the clamping block is retracted into the insertion block by virtue of the movement of the movable plate, so that the insertion block is not limited by the insertion slot any more, namely, the insertion block is pulled back into the first fixing plate, so that the first fixing plate and the second fixing pla