The present disclosure provides a reliability resource allocation method and apparatus. The method includes: receiving, by an NFVO (network functions virtualization orchestrator), a reliability requirement of a user for an application service; decomposing, by the NFVO, the reliability requirement to determine a reliability requirement of a virtual machine providing the application service; selecting, by the NFVO from a preset reliability information base according to the reliability requirement of the virtual machine, a reliability resource that meets the reliability requirement of the virtual machine; and sending, by the NFVO, the reliability resource to a VIM (virtualized infrastructure manager), so that the VIM starts the reliability resource. According to the method provided in embodiments of the present disclosure, the reliability requirement of the user for the application service can be accurately met.