The invention discloses a permission control method based on a multi-layer hierarchy system. The method comprises steps as follows: function information in the system is extracted and pre-stored into a database; method functions realizing functions in the system are encapsulated, and a class library of a management layer is established; when a system user logs in, a permission detection interface encapsulated in advance is called to verify the permission of the user; according to the permission of the user, the method function corresponding to the corresponding function is extracted from the class library for loading. According to the permission control method based on the multi-layer hierarchy system, the users logging in the system are authorized respectively according to distinctions of regions, roles and the users, different control permissions are granted to administrators in different classes, and the users with limited permissions cannot see all management modules and cannot operate corresponding functions; with the adoption of the method, staff can be effectively managed, a complicated management system is simplified, time is saved, the operation is easy, manpower is saved, and the work quality is improved.