Embodiments of the present application disclose a virtual network function resource management method and device. The method comprises: a virtual network function management (VNFM) device sending a preprocessing request message to an element management (EM) device, wherein the preprocessing request message is used to request the EM device to perform resource scaling preprocessing on a virtual network function (VNF) instance, and the resource scaling preprocessing comprises performing migration processing on a service carried by a virtualized container that needs to undergo resource scaling preprocessing; and the VNFM device performing resource scaling processing on the VNF instance after determining that the EM device has completed the resource scaling preprocessing. According to the method and device provided by the embodiments of the present invention, migration processing is performed on a service carried by a virtualized container on which preprocessing is performed, so that the service carried by the virtualized container corresponding to a VNF instance is not damaged when resource scaling processing is performed.