Self-driving car is the developmental trend of vehicle.Although it has a high level of security,accident and damage are inevitable.Since self-driving car has the characteristic of autonomy and diversity of driving modes,under the current legal system,when it causes significant property damage and casualties,there are many conflicts between behavior of relating subjects and the traffic accident crime,and the subjects cannot be punished for traffic accident crime for lack of related elements,which make the current law cannot regulate such incidents.On the other hand,traffic accidents could be caused by many reasons,and it is difficult to identify the one cause it.To solve this difficult problem,a rational way combining science and technology and various systems should be taken to lay the foundation for development and use of self-driving cars in China.