Arc-shaped corner decoration device for ceiling and wall surface of performance hall

The utility model relates to an arc-shaped corner decoration device for a ceiling and a wall surface of a performance hall. The arc-shaped corner decoration device comprises a wall surface decorationstructure and a ceiling decoration structure, arc-shaped corner decoration structures are arranged at the corners of the wall decoration structure and the ceiling decoration structure. The arc-shapedcorner decoration structure comprises a composite arc-shaped corner plate, a Z-shaped clamp hanging assembly and an aluminum profile connecting keel. The upper end of the aluminum profile connecting keel penetrates through the ceiling gypsum board through a fixing piece and then is fixed to the ceiling keel support. The lower end of the aluminum profile connecting keel is connected with an upper horizontal part corresponding to the composite arc-shaped corner plate through a fixing piece, the arc-shaped part of the composite arc-shaped corner plate is fixedly connected with a corner connectingclamp, and the arc-shaped