The input-output table of 42 sectors of Chongqing in 2007 is used to reintegrate and calculate for the input-output table of 14 industrial sectors. This paper uses input-output theory analysis method to make industrial correlation analysis and industrial spillover effect analysis for Chongqing financial service industry, analyzes the correlation between Chongqing financial service industry and other industries, studies the influence of Chongqing financial service industry on national economy and puts forward policy suggestions for accelerating the development of Chongqing financial service industry.