This application provides a camera decoration assembly. The camera decoration assembly includes a decoration member, a mounting member and a fastener. The decoration member is exposed from a housing; and the decoration member and the mounting member are connected through the fastener or buckling, and are pressed on two opposite sides of the housing respectively. The mounting member includes a body and a conductor embedded in the body; and the conductor is of a metal structure, and is partially exposed from the body to be electrically connected to the decoration member and grounded. In the camera decoration assembly, the decoration member is mounted from outside of the housing, and the mounting member is mounted from inside of the housing, and is connected to the decoration member through the fastener or buckling. An appearance size of the decoration member located outside the housing is not limited by a size and a layout of an internal structure of a mobile terminal device. This application further provides a mobile terminal device including the camera decoration assembly.