To meet the collaborative management requirement of multi-core network enterprise group on SaaS-based collaborative platform of automobile industry value chain with automobile parts industry value chain, a multi-tenants and multi-level authorization model based on the core of a leading enterprise is proposed on the basis of the traditional RBAC model. The scheme effectively controls users' access rights.and achieves analysis of authority by using menu dynamic generating technology and URL address resolution algorithm. The plan and the implementation are tested on the SaaS-based collaborative platform of industrial-chain. The results show that it can solve the problem of authority management of multi-tenants for SaaS-based Collaborative Platform of industrial-chain.