This paper studies the famous think tanks of China.Based on the characteristics of the building of think tanks in terms of academic connotation and from the perspective of informetrics,it makes quantitative evaluation and analysis on its academic status by means of statistical analysis.The research findings are as follows: the discrimination validity of the h index used to assess the academic influence of think tanks is not high,but a good effect can be achieved if jointly using the g index,academic difference and academic potential to assess the academic influence of think tanks.The extent of the academic influence of think tanks is in proportion to their comprehensive influence.