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An electronic instrument which is called automobile parameters recorder can real-time gather and record the automobile driving conditions, which is very important to the driving safety and the analysis of the traffic accident responsibility. The working environment of the parameters recorder is severe and its external disturbance is strong. In order to insure proper operation, the strong anti-interference ability must be needed. The structure, principle, speed calculating methods, software designing and the anti-interference strategies of the system are mainly presented in this paper.