An alarm information reporting method and apparatus are provided. The method is applied to an NFVI. A monitor is arranged at an NFVI hardware layer, a software layer includes a VNF virtual machine, and a monitor, an alarm classifier, and a virtual machine manager are arranged at the software layer. The method includes: detecting, by the monitor, physical resource alarm information and sending the physical resource alarm information to the alarm classifier; obtaining, by the alarm classifier, virtual machine information from the virtual machine manager based on the physical resource alarm information and sending the physical resource alarm information to an analog processor corresponding to the virtual machine information; and obtaining, by the analog processor, virtual resource alarm information based on the physical resource alarm information and reporting the physical resource alarm information and the virtual resource alarm information to a VNF in a virtual machine.