Abstract: The study on the change in tropical cyclone intensity has attracted more attention. Significant progresses have been made in the subject since 1995. This paper summarizes the achievement of research in the change in intensity of tropical cyclone made in recent years. It mainly include (1) the achievements of tropical cyclone genesis and its maximum potential intensity;(2) the effects of gradient of planetary vorticity, environmental uniform flow, vertical shear of environmental flow and the interaction between the outflow of tropical cyclone and enveironmental flow on the change in intensity of tropical cyclone;(3) the relationship between the change in the structure of tropical cyclone and its intensity variation, particularly in the field of asymmetric structure induced by the environment flow, the application of verifying of the theory of the slant vorticity development and theory of vorticity Rossby wave in the change in tropical cyclone inteensity; (4) summarizing the the role of the thermal regime of ocean and sea spray on the change in intensity of tropical cyclone. It is concluded that although the obvious progress has been made in recent years, there are many challenges in the field of the change intensity of tropical cyclone. The application of satellite data such as AMSU, Quik SCAT and cloud track retrieved wind in the research of the change in tropical cyclone intensity should be strengthened. Besides, more attention has been paid to the interaction between the outflow of tropical cyclone and the trough of midlatitude, the initial field of the oceanatmosphere coupled model, the parameterizations of interface of ocean and atmosphere, and the mechanism of the effect of structure change of tropical cyclone on its intensity. It is expected that the results of researches may promote understanding of the change in tropical cyclone intensity and improve the intensity forecast skill.