Abstract: Based on the data list of Beijing exhibition enterprises, taking the agglomeration area of Beijing International Exhibition Center as a case,and using Ripley K function and Questionnaire survey, exhibition industry cluster is investigated. Research shows that the exhibition industry cluster is a collection of temporary cluster and permanent cluster based on a large exhibition with a hall as the core. The case analysis shows that the exhibition industry cluster has been initially formed, but the degree of clustering is relatively low. In the cluster, the development of permanent agglomeration is more mature than that of the temporary agglomeration. The exhibition enterprises have significant characteristics of spatial agglomeration in permanent agglomeration and the network relationship between enterprises has been formed; The mechanism of knowledge flow and information transfer in the temporary cluster only be basically established. The results will further enrich the research content of industrial agglomeration and provide theoretical basis for the local government to promote the development of exhibition industry cluster.