Embodiments of this application disclose a network access method and a communication apparatus, applied to the communication field, to improve accuracy of accessing a network by a terminal device. The method in embodiments of this application includes: A first network element first obtains an access request including access location information of a first terminal device, where the first network element may be an access management network element or a UDM network element, and the access management network element may be an AMF network element or an MME network element; then, the first network element may obtain subscription information including subscription location information of the first terminal device; when the first network element determines that the access location information of the first terminal device does not belong to the subscription location information, the first network element may obtain allowed information for allowing the first terminal device to access a network at an access location corresponding to the access location information; and the first terminal device may further be allowed, based on the allowed information, to access the network at the access location corresponding to the access location information.