Abstract: The technologies of access control administration provide security and consistency to access control policies. Aiming at the problems of complex assignment, scalability and lacking of effective support for cross-domain access management of exsisting models, this paper proposes a multi-level&inter-domain access control administrative model (ML-IDACAM) by combining the characteristics of multi-level&inter-domain system and the ifne-grained need of access control administration, bringing forward the model’s basic elements, element relationships, constraints and administration rules. Compared with related works, the ML-IDACAM model which has good expansibility and ifne-grained operation can support secure and centralized access control administration.