A B class economical car equipped with front Macpherson and rear twist beam was established,the correction of the model was validated by test results.Based upon a large amount of twist beam suspension Kinematic and compliance(K&C)test data and wheel alignment,by means of orthogonal experimental design,sensibility analyses of vehicle handling performance to rear axle K&C characteristics were carried out,which brought out how each of K&C parameters affects the handling vehicle performance.