A resource allocating method for a VNF and an apparatus are used to resolve a prior-art problem that when a VNF is established. In the method, a resource allocation device in an NFV architecture selects a corresponding physical machine for a VDU based on a resource configuration information group of the VDU. The resource configuration information group includes a resource scheduling parameter, and the resource scheduling parameter is for indicating a requirement of a VNF on a resource selection and scheduling policy. In this way, when a plurality of factors need to be considered to schedule a resource for the VDU, the resource configuration information group may include resource scheduling parameters that indicate a plurality of factors, and the resource allocation device may schedule a resource for the VDU based on a plurality of factors, thereby improving resource scheduling flexibility in a VNF instantiation process.