Abstract: The evolution of entrprises cluster is influenced mainly by the enterprise individual adaptability,the market environment and the symbiosis among the enterprises.The essence of evolving enterprises cluster is a complex system that the interaction between regional economy system and regional ecosystem.The development of regional enterprises cluster is double restricted by interest driven mechanism and ecological balance mechanism.Under the domination of the compounding mechanism,the evolution of regional enterprises cluster takes on complicated behavior and orbit.The evolution track of enterprises cluster of China's manufacturing industry was measured by the evolution model in 1985-2004.The conclusion indicates that the agglomeration level of China's manufacturing industry is rising continuously excluding ordinary machinery enterprises.Now enterprises clusters has entered the pullulating or mature period,such as medical and pharmeaceutical products,transport equipment enterprises,electric equipment and machinery enterprises,electronic and telecommunications equipment enterprises and instruments,cultrual and office enterprises and so on.The agglomeration elasticity can reflect the different influence that the changing of different agglomeration level brings on the development of economy;all these can offer the reference for appraising and developing industry cluster.

Key words: enterprises cluster, evolution model, agglomeration elasticity