The invention provides a method and system for achieving networking communication among vehicles. The method and system are mainly used for solving the problem of communication among the road drivingvehicles, the communication modes such as broadcasting or flooding which are adopted by the Internet of Vehicles at present are avoided, communication resources are saved, and the resource utilizationefficiency is improved. The specific process of the method mainly comprises the following steps that a vehicle notifies self information such as the current position, the driving direction and the driving speed of the vehicle in a broadcasting mode and sends the information to adjacent nodes, so that the adjacent nodes judge whether or not to establish communication connection relations accordingto the fact whether or not the driving direction and the driving speed are consistent; if the communication connection relations are established, a communication connection relation table of the vehicle is updated, and the communication connection relations are notified to the adjacent nodes around the vehicle, so that a head node in a group learns all the communication connection relations in the group; and an end-to-end path topological relation diagram in the group is calculated and notified to all the vehicle nodes in the group, so that all the vehicles in the group conduct information sending and receiving according to the calculated end-to-end topological relation.