Aiming at various, heterogeneous, dynamic characteristics of the synthesized evaluation data for dynamic vehicle safety status, the influence factors of vehicle safety status including driver, vehicle and environment were systematically analyzed and sorted. An evaluation system and evaluation model for dynamic vehicle safety status were built based on the fuzzy comprehensive evaluation theory. The dynamic parameters of evaluation indexes were automatically obtained from vehicle terminal, and the evaluation vector and its maximum membership value were calculated. The safety status of vehicle moving along a straight or a curvature road was judged by the principle of maximum hamming. This model provides a new method of evaluating dynamic vehicle safety status.