Embodiments of this application disclose an access control method, a terminal, and an access network device. The method includes: receiving, by an access network device, indication information; determining, by the access network device, a terminal as a terminal in high-speed movement based on the indication information;
performing, by the access network device, a timing operation; when a time of the timing operation exceeds a preset time threshold, calculating, by the access network device, a moving speed of the terminal; and when the moving speed of the terminal is less than a preset speed threshold, forbidding, by the access network device, the terminal to access a cell of the access network device, where the cell of the access network device is a dedicated cell of a terminal located in a high-speed moving vehicle.