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With the development of the economy, the per capita car ownership has increased rapidly, and road traffic safety has caused huge casualties. It is necessary to evaluate the safety of driving behavior. Firstly, the evaluation index system of driving behavior safety is studied. The evaluation index system is constructed from the aspects of driving mileage, overspeed time and dangerous operation , and AHP was used to assign weights to evaluation indicators. Secondly, the safety evaluation method of driving behavior is studied. The fuzzy comprehensive evaluation method is used to evaluate the safety of driving behavior. The driving behavior is quantitatively analyzed from five stages: construction factor set, comment set, weight vector, membership degree matrix and fuzzy comprehensive evaluation result matrix. Then, the driving behavior safety evaluation system is implemented on the Android-based development platform. Finally, the OBDII simulator experiment and the real vehicle test show that the above method and the implemented system can accurately evaluate the driving behavior safety in real time.