The driving avoidance system plays an important role in reducing traffic accidents. The combination of driving environment data information and driving avoidance system is a big prospect in the future. It takes the Arduino microcontroller as the total controller, combined with the HC-SR04 ultrasonic module and the OPEN MV4 H7 module, and the raindrop sensor, temperature and humidity sensor and other auxiliary to achieve the expected design requirements. The design has the advantages of low cost and simple structure. It can not only be used as an optional device for vehicles, but also can be modified on existing vehicles to further improve the safety of vehicles. This design is through the monitoring of the driving environment to design the driving avoidance system, due to the degree of learning and hardware facilities and other conditions, can only try to achieve the requirements of the plan, if applied to reality, in some places there are still defects and deficiencies, to be more in-depth study.