In this study, the Doppler migration technology in 5G mobile communication network was investigated as a vehicle-to-vehicle communication system. The advantages of using Doppler migration technology to investigate the anti-collision warning system are that it can detect a dozen vehicles in front of the vehicle equipped with it, and it is not disturbed by environmental factors such as light, rain, smoke, and dust. This system was used in a non-line-of-sight collision avoidance warning system in an observer vehicle to effectively carry out early warning judgments on multiple vehicles ahead of the observer vehicle. Judgments on traffic collision warnings were based on Doppler migration technology that signals between different vehicles to predict whether the observer vehicle will collide with a vehicle ahead of it. MATLAB software was used, and a crossroads was selected as the scenario for the simulation. To process the simulation, the starting coordinates, starting speed, acceleration, driving direction, and simulation times of each vehicle were input as the simulation parameters. All moving conditions of each vehicle in the simulation process were generated, including the coordinates, distance, speed, and angle between the observer vehicle and other vehicles. A flowchart for the process of making a judgment on driving collision warnings was proposed to judge if a collision between two vehicles would occur.