The purpose of this paper is to explore the security management mechanism of enterprise Hadoop big data platform.First it introduces the existing problems and deficiencies in enterprise Hadoop big data cluster safety management; then combined with the current development status and the third party Hadoop ecosystem safety management module of security information management solutions, it solves the problems of Hadoop big data platform security management mechanism by optimization and integration;finally it puts forward the Ranger+FreeIPA (Kerberos+LDAP) solution.