Based on the phase mode of tritium monitoring, this paper introduces four commonly used tritium monitoring methods, reviews the research progress and experience of domestic and foreign scholars in the field of tritium monitoring in recent years, and analyzes the characteristics of the four methods in detail. Afterwards, it analyzed the problems with the most widely used ionization chamber tritium measurement method in the engineering field in China at this stage, and evaluated its advantages and disadvantages in engineering applications. Finally, corresponding solutions were proposed for each of its existing problems. At the same time, the application of this method in tritium monitoring in the future is prospected.