A vehicle-mounted device information display method is provided. The method is applied to the Internet of Vehicles or self-driving field and includes: obtaining information about lane lines of a road surface on which a first vehicle is located, where the lane lines are at least two lines on the road surface that are used to divide different lanes; and displaying, based on the information about the lane lines, virtual lane lines whose types are consistent with those of the lane lines. This method can be applied to a self-driving interface in an intelligent car, so that a driver can obtain, from the self-driving interface, types of the lane lines of the traveling road surface in this case. This enriches display content of the self-driving interface.