Abstract: China's nuclear energy industry started with difficulties and has achieved brilliant achievements after more than 40 years of development. However, there are still contradictions such as low resource utilization rate and some problems in spent fuel treatment that need to be further resolved. Therefore, China focuses on nuclear fusion energy which is regarded as the most crucial step in solving energy problems and has significant strategic significance for the sustainable development of China's future energy and national economy. Tritium is the main fuel for nuclear fusion. In the scientific research of tritium in China, a large amount of studies has been conducted on tritium chemistry, physics, technology, protection, and engineering technology. These studies further highlight the importance of the radioactive nuclide tritium in nuclear fusion systems. Additionally, to ensure the safe utilization of tritium fusion energy, continuous efforts should be made in tritium environmental monitoring, toxicological effects of tritium post entering the organism body, and tritium-related standards.