This application discloses an access control method and apparatus for a terminal device, to resolve communication failures occurring in a non-terrestrial network when a public land mobile network selected by a terminal device may not be a public land mobile network of a country in which the terminal device is located. The method includes: A network device receives public land mobile network information indicating a first public land mobile network selected by the terminal device. The network device obtains location information of the terminal device, and determines, based on the location information and country information that corresponds to the first public land mobile network, whether the terminal device is allowed to access the first public land mobile network.