A method for deploying a virtualised network function VNF, comprising: receiving (S517), by a virtualised network function manager VNFM, a first request message, wherein the first request message comprises an identifier of a first VNF, a value of a flavour parameter of the first VNF, and a value of a deployment parameter corresponding to the value of the flavour parameter of the first VNF; and determining, by the VNFM, a first virtualised network function descriptor VNFD based on the identifier of the first VNF, wherein the first VNFD comprises a primary file and one or more secondary files, there is a mapping relationship between the primary file and each of the one or more secondary files, the primary file comprises a deployment parameter of each secondary file and a first association relationship, and the first association relationship is used to indicate that a value of the flavour parameter of a VNF is associated with a deployment parameter of a secondary file; and determining (S520), by the VNFM, a target file from the one or more secondary files based on the value of the flavour parameter of the first VNF; and determining, by the VNFM, based on the first association relationship and the value of the flavour parameter of the first VNF, a deployment parameter of the target file from the deployment parameter of each secondary file included in the primary file; determining (S521), by the VNFM, the value of the deployment parameter corresponding to the value of the flavour parameter of the first VNF as a value of the deployment parameter of the target file; inputing, by the VNFM, the value of the deployment parameter of the target file into the target file based on the mapping relationship between the primary file and the target file, and deploying, by the VNFM, the first VNF based on the value of the deployment parameter of the target file. receiving (S517), by a virtualised network function manager VNFM, a first request message, wherein the first request message comprises an identifier of a first VNF, a value of a flavour parameter of the first VNF, and a value of a deployment parameter corresponding to the value of the flavour parameter of the first VNF; and determining, by the VNFM, a first virtualised network function descriptor VNFD based on the identifier of the first VNF, wherein the first VNFD comprises a primary file and one or more secondary files, there is a mapping relationship between the primary file and each of the one or more secondary files, the primary file comprises a deployment parameter of each secondary file and a first association relationship, and the first association relationship is used to indicate that a value of the flavour parameter of a VNF is associated with a deployment parameter of a secondary file; and determining (S520), by the VNFM, a target file from the one or more secondary files based on the value of the flavour parameter of the first VNF; and determining, by the VNFM, based on the first association relationship and the value of the flavour parameter of the first VNF, a deployment parameter of the target file from the deployment parameter of each secondary file included in the primary file; determining (S521), by the VNFM, the value of the deployment parameter corresponding to the value of the flavour parameter of the first VNF as a value of the deployment parameter of the target file; inputing, by the VNFM, the value of the deployment parameter of the target file into the target file based on the mapping relationship between the primary file and the target file, and deploying, by the VNFM, the first VNF based on the value of the deployment parameter of the target file. <EOS>