The invention discloses an accident simulated reconstruction system of cars out of control bumping onto fixtures in traffic accident identification by public security departments. The system can be used for utilizing the basic data inspected on the accident scene, calculating the running speed and bumping speed in the bumping accident of the car out of control bumping onto the fixtures, and realizing the two-dimensional track description and three-dimensional process reproduction of the car in the accident, the output of the major calculation data sheet of the accident, and the output of detailed text of the accident. The system provided by the invention can be widely popularized and applied, thus effectively improving the technical content of identification and processing of traffic accidents, ensuring that the analysis and identification results can be highly acknowledged by traffic management departments, accident identification units and all the parties in the accident, and playing important roles in distinguishing responsibilities, avoiding the intensification of the conflict, reducing the unstability in the society, and strengthening the harmonious operation of social life.