Abstract: In recent years,with the mature development of hydrogen energy utilization technology has been incorporated into China’s energy strategy,the planning and layout of hydrogen energy industry across the country is also speeding up,and one after another,local governments have released the development plan of hydrogen energy industry,which has set off a wave of hydrogen energy development.Therefore,a comparative study of the evolution path of hydrogen energy industry policies in China’s important cities of Beijing,Shanghai,Guangzhou and Wuhan is an important support for the further development and steady promotion of the sustainable development of China’s hydrogen energy industry.This paper uses text mining technology to firstly systematically analyze and compare the hydrogen energy technology research bases of Beijing,Shanghai,Guangzhou and Wuhan,and then statistically analyze the number of hydrogen energy policies released by the four cities in different time periods and relevant departments,and finally study the hydrogen energy industry policy evolution in China and the four cities by analyzing the time zone map of the policy evolution in different time periods of China and the four cities and the co-occurrence of the theme word relationship.The results show that although China’s research and development of hydrogen energy started relatively late,after 2010,the research and development vigor and enthusiasm in hydrogen energy technology related fields in the four cities have shown an explosive growth trend.Guangzhou,with a consistently high average annual number of hydrogen energy policy releases since 2010,tops the list of the four cities.The four cities of Beijing,Shanghai,Guangzhou and Wuhan have chosen to carry out the strategic layout of hydrogen energy industry in diversified fields such as the whole industrial chain of fuel cells,green hydrogen production,key components,and electric power grids,which will provide an important support for China to realize the comprehensive development of hydrogen energy industry.

Key words: Hydrogen Energy, Industrial Policy, Policy Evolution, Bibliometrics, Text Mining Technology