This report comprehensively introduces the latest progress of China’s nuclear energy industry development in 2021 from 9 aspects. In 2021，the number of China’s commercial nuclear power units has reached 51，and the nuclear power generation has increased by 11.17% compared to last year. The scale of nuclear power units under construction has continued to be the largest in the world. A series of new achievements have been made in nuclear energy technological innovation. Nuclear fuel cycle industry，nuclear power equipment manufacturing，nuclear industry management and safety assurance，nuclear talent team assurance capabilities have been continuously improved. International cooperation in nuclear energy has continued to deepen，and new progress has been made in the application of nuclear technology. Currently，the development of China’s nuclear energy industry has entered a new stage of “actively，safely and orderly”. Looking forward to the future，the scale of nuclear power installed capacity will further increase，the layout of nuclear power is expected to be more balanced，the innovation of nuclear technology will better enable the high-quality development of the nuclear energy industry，the multi-purpose utilization of nuclear energy will enter a period of acceleration，and the policy environment for promoting the development of nuclear energy will be more perfect.