The invention discloses a network slice manager and a management method thereof, and belongs to the technical field of communication. The manager comprises a creation module, an expansion module, a deletion module, a user request table, a network slice parameter table, a network slice state table and a plurality of external interfaces, wherein the creation module is respectively connected with the user request table and the network slice parameter table; both the expansion module and the deletion module are respectively connected with the network slice parameter table and the network slice state table; the creation module is connected with a core network, an access network, a physical resource pool and a user by the external interfaces; the expansion module is connected with an existing network slice and the physical resource pool by the external interfaces; and the deletion module is connected with the existing network slice by the external interface. The management method of the manager comprises three parts of creation, expansion and deletion of the network slice. According to the network slice manager and the management method thereof, which are disclosed by the invention, the network slice which meets requirements can be created according to user demands, and a utilization rate of the network slice is effectively maximized, so that a utilization rate of network resources is improved.