The present invention provides a virtualized network function scaling method and an apparatus. The method includes: receiving a network service scaling request, the request includes a deployment flavor identifier, the network service includes an instance of a first VNF (VNF1) and an instance of a second VNF (VNF2), VNF instances are connected by using an instance of a first VL (VL1); obtaining a deployment flavor and adding a new instance of the VNF1; obtaining a modification policy of the VL1; generating descriptor of a second VL based on information about a connection point of the new instance of the VNF1; creating an instance of the second virtual link according to the descriptor of the second VL, to connect the new instance of the VNF1 to the instance of the VNF2. In this solution, a new VNF instance obtained after service scaling can be connected to another VNF instance.