【摘要】This paper is a study of Gini-coefficient of Chinese manufacturing industry.In 1991,Krugman calculated the Gini-coefficient of manufacturing industries in the U.S.A,while Amiti calculated that in the E.U in 1998.We calculate that of Chinese manufacturing industries and compared it with the international situation.Moreover,we also proved the hypothesis that FDI helps to raise industrial agglomeration level by means of calculating the correlation between FDI and industrial regional Gini-coeffticient.