The existing Sandhu method and one Role-Based Access Control(RBAC) construction method considering the role context and simulating Mandatory Access Control(MAC) were analyzed. For the problems of Sandhu method not considering via the role context and of later method existing privilege diffusion and lacking the ability of supporting least privilege and separation of duties, this study proposed an advanced method of reconstructing the role-based access control model with role context considered. The structure of the proposed construction provided a better solution for problems existing in the considering role context RBAC construction method, and re-defined the role context to make the method more suitable for the practical application. A brief theoretical analysis of the new construction was given in the end.