Abstract: Atmospheric pressure microwave plasma torch has excellent performance and a wide application prospect, the study of atmospheric pressure microwave plasma torch device received extensive attention of the researchers and industry. In this paper,the nature,installation and application of the atmospheric pressure microwave plasma torch,were explained briefly. The basic principle of atmospheric pressure microwave plasma torch device was emphatically elaborated, and the advantages and disadvantages of various devices were analyzed. Finally,the application of atmospheric pressure microwave plasma torch device and the research direction in the future were discussed in detail.