In recent years, the marine organism resources in coastal areas of China have been declining continuously due to many ongoing problems, such as the  over-use of the marine fishery resources and environment pollution. Artificial enhancement and releasing had become one of the effective methods to repair the fishery resources, in which the biomarker technology of the releasing species is an important mean to evaluate the effect of releasing the fishery. The Coded Wire Tag (CWT) technology, as a kind of internal sign method of fishery biology, has been widely used in the fields of population density, survival rate, stock recruitment assessment and migratory distribution. In this paper, based on a large number of relevant information and research on CWT, the history of the development of the Coded Wire Tag (CWT) technology were mainly introduced, and its application in the biological release of fisheries were briefly described, and its advantages and disadvantages were analyzed. In summary, CWT has the advantages of high marking speed, small damage to the fish, high tagging retention rate and batch marking with low costs; meanwhile, it has the disadvantage of a relatively low recapture rate. With the continuous development of fishery biomarker technology, the CWT will be more widely used in the field of fisheries resources enhancement and releasing, and become one of the development directions for the study of tagging and releasing.