A method for creating a network slice, characterized by comprising: obtaining, by a Management and Orchestration system, MANO, name information of a first network slice to be created; wherein the name information comprises a name of a data center network to which the first network slice belongs, a name of a first slice network in the first network slice, a name of a first Network Service, NS, in the first slice network, and a name of a first Virtual Network Function, VNF, in the first NS, and the data center network is established according to a preset provider network; obtaining, by the MANO, first Virtualised Network Function Descriptor, VNFD, information corresponding to the first NS and second VNFD information corresponding to the first VNF; wherein the MANO stores a plurality of preset NSs, a plurality of preset VNFs, VNFD information corresponding to each of the plurality of preset NSs, and VNFD information corresponding to each of the plurality of preset VNFs, the plurality of preset NSs include the first NS, and the plurality of preset VNFs include the first VNF; creating, by the MANO, the first slice network corresponding to the name of the first slice network, the first NS corresponding to the name of the first NS, a subnet of the first NS, the first VNF corresponding to the name of the first VNF, and a subnet of the first VNF according to the first VNFD information and the second VNFD information; creating, by the MANO, at least one port and at least one Virtualised Network Function Component, VNFC, in any one or more networks among the subnet of the first NS and the subnet of the first VNF, and connecting the at least one port to the at least one VNFC in one to one correspondence, to provide network services for a client connected to the first slice network through the VNFC, and completing a process of creating the network slice; wherein the first network slice is divided into four levels, which are a data center-level network of first level, a slice-level network of second level, an NS-level network of third level and a VNF-level network of fourth level; wherein the data center level network of first level is used by the slice-level network, the NS-level network and the VNF-level network, the slice-level network of second level is created for a tenant using a slice name and is used by the NS-level network and the VNF-level network contained in a slice, the NS-level network of third level is created for a tenant using an NS name and is used by the VNF-level network contained in the NS, and the VNF-level network of fourth level is created for a tenant using a VNF name. obtaining, by a Management and Orchestration system, MANO, name information of a first network slice to be created; wherein the name information comprises a name of a data center network to which the first network slice belongs, a name of a first slice network in the first network slice, a name of a first Network Service, NS, in the first slice network, and a name of a first Virtual Network Function, VNF, in the first NS, and the data center network is established according to a preset provider network; obtaining, by the MANO, first Virtualised Network Function Descriptor, VNFD, information corresponding to the first NS and second VNFD information corresponding to the first VNF; wherein the MANO stores a plurality of preset NSs, a plurality of preset VNFs, VNFD information corresponding to each of the plurality of preset NSs, and VNFD information corresponding to each of the plurality of preset VNFs, the plurality of preset NSs include the first NS, and the plurality of preset VNFs include the first VNF; creating, by the MANO, the first slice network corresponding to the name of the first slice network, the first NS corresponding to the name of the first NS, a subnet of the first NS, the first VNF corresponding to the name of the first VNF, and a subnet of the first VNF according to the first VNFD information and the second VNFD information; creating, by the MANO, at least one port and at least one Virtualised Network Function Component, VNFC, in any one or more networks among the subnet of the first NS and the subnet of the first VNF, and connecting the at least one port to the at least one VNFC in one to one correspondence, to provide network services for a client connected to the first slice network through the VNFC, and completing a process of creating the network slice; wherein the first network slice is divided into four levels, which are a data center-level network of first level, a slice-level network of second level, an NS-level network of third level and a VNF-level network of fourth level; wherein the data center level network of first level is used by the slice-level network, the NS-level network and the VNF-level network, the slice-level network of second level is created for a tenant using a slice name and is used by the NS-level network and the VNF-level network contained in a slice, the NS-level network of third level is created for a tenant using an NS name and is used by the VNF-level network contained in the NS, and the VNF-level network of fourth level is created for a tenant using a VNF name.