To solve the problems that the construction method of assessment system was unscientific, the weight calculation of evaluation indexes and the distribution of subjective and objective weight were irrational, a new method of constructing evaluation system of drivability for vehicles and determining indexes weight for drivability evaluation was proposed. Considering the connotation of vehicle drivability in creep condition, the drivability evaluation system of creep condition was designed based on SMART principle, and the evaluation system was established from three dimensions of longitudinal response, longitudinal smooth and longitudinal steady state. The analytic hierarchy process and combined entropy was also proposed to calculate the subjective and objective weights respectively, and a comprehensive weight optimization model was designed based on network hierarchy and combined entropy to calculate the weight of evaluation indexes in the evaluation system to balance the subjectivity and objectivity. Many vehicles were evaluated under creep condition and the results show that the evaluation results obtained by the proposed method are more accurate than those by the analytic hierarchy process and the entropy weight method. The construction method of the evaluation system is more scientific and the weight calculation method is more effective.