Now the subjective evaluation methods used in vehicles equipped with dual clutch transmission for shift quality causes the discreteness of evaluation results and the simple objective evaluation method leads to the evaluation results being limited to the data and ignoring the subjective knowledge guidance. The shift quality evaluation index is determined from three dimensions of time

longitudinal acceleration and engine speed. Based on the hierarchical clustering method and expert knowledge

the shift quality evaluation system is scientifically established. According to the evaluation system

the subjective weight of the shift quality evaluation index is obtained by combining the Delphi method and the analytic hierarchy process. The objective weight of the shift quality evaluation index is calculated by the coefficient of variation method

and the combined weight is given based on the principle of optimal allocation. Then the method of determining the membership function based on data difference and fuzzy threshold is proposed. Finally

the fuzzy comprehensive evaluation model of shift quality is established. The data based on the data difference and the fuzzy threshold are proposed. The experimental data is used to verify the effectiveness of fuzzy comprehensive evaluation model and coefficient of variation method in shift quality evaluation

and the fuzzy comprehensive evaluation model is verified more efficiency and accuracy

relative to the simple objective evaluation method. Each index reveals shift quality by re-evaluation of the right size for the two shift quality importance which provides effective guidance for improving the shift quality of the vehicle.