Pre-fabricated wall body for building decoration

The utility model discloses a pre-assembly type building decoration wall body which comprises a wall body, an end sliding groove is formed in the end portion of the wall body, a positioning mechanism is arranged at the end, away from the end sliding groove, of the wall body, a connecting mechanism is arranged on the surface of the bottom of the end sliding groove, and the connecting mechanism comprises a positioning groove. The positioning groove is formed in the surface of the bottom of the end sliding groove, a movable groove is formed in the surface of the side wall of the positioning groove, a limiting block is slidably connected into the movable groove, an ejection spring is fixedly connected to the end, close to the bottom of the movable groove, of the limiting block, and a clamping column is fixedly connected to the circle center of the bottom of the positioning groove; according to the wall connecting device, the longitudinal movement and the axial movement of the positioning column are limited, the p