The apatite (U-Th)/He dating method has been proved to be a powerful and useful tool in the field of low-temperature thermochronology, because it has the lowest available He closure temperature and can reflect the information of the thermal histories at low temperature (40～90℃). This review gives a brief account of the principles, calibrations, laboratory procedures, applications and existing problems of the method, highlighting the progress of the study of radiation damage in recent years. The main content of this paper includes: ① the principle of the radiation damage and the development of the "trapping model"; ② the effect of the radiation damage on apatite (U-Th)/He dating; ③ the development of the new model, i.e., the Radiation Damage Accumulation and Annealing Model; ④ the Applications of the radiation damage.