Abstract: In recent years, mobile games have been developing vigorously and widely praised by users. However, due to the "limitations" of existing technology, mobile games face five constraints:too small screen size; small memory capacity; unstable network traffic; difficulty of ergonomic design; update of fragmented operation design. Because of these, this paper explores the unique audiovisual language characteristics of mobile games from the aspects of interface design, music and sound effect design, and points out the new opportunities and challenges of mobile games.