Abstract: Cluster enterprises take advantage of obtaining external knowledge, so knowledge spillover plays the important role in industrial cluster and cluster enterprises. The effect of knowledge spillover was analyzed through the innovation model between the knowledge spillover enterprise and the knowledge acceptant enterprise．Meanwhile the spiral promotion mechanism of the knowledge innovation and imitation was discussed. Finally, it was presented that the knowledge spillover of industrial cluster promotes the innovative and competent capability of enterprises cluster.

Key words: Industrial cluster, Knowledge spillover, Innovation 

摘要： 集群企业在获取外部知识方面处于有利的地位,因此知识溢出对于产业集群以及集群企业的发展具有重要的作用。建立了知识溢出企业和知识接受企业的创新模型，分析了知识溢出效应，讨论了产业集群知识创新和模仿的螺旋机制，最后指出产业集群的知识溢出效应提升了企业集群的创新能力和竞争力。

关键词: 产业集群, 知识溢出, 创新