【摘要】Manufacturing Industry is the most representative one of all kinds of industrial clusters.The paper measures the agglomeration degree of China's twenty manufacturing industries in 1993,1997,2002 and 2003 by means of the index of industry concentration constructed by Ellison and Glaeser and concentration degree of the regions whose manufacture sales incomes rank the top five.The conclusion indicates that the agglomeration degree descended from 1993～1997 and ascended from 1997～2002～2003.The raise of the agglomeration degree is the main development trend.The industries ale sorted to the following categories:technology intensive industry—capital intensive industry—labor intensive industry by the descending agglomeration degree.The regional distribution is sharply unbalanced and polarization is serious.As a whole,the agglomeration degree of manufacturing industry has a strong positive correlation with the industry growth.