Abstract: With the rapid development of Digital Library in grid environment and the constant updating,more and more re- sareh about security authentication system of Digital Library, based on the analysis of the defects of existing grid security system based on Digital Library, introduced the grid Security management need to fulfill the tech- nical requirements.The final realization of the digital library multi-level authorization access control security model of deployment, has a certain theoretical value and practical significance.

Key words: grid environment; digital library; security model