Based on the method of the design for six sigma (DFSS)， the brake pedal force and brake pedal travel was optimized in the condition of the brake deceleration speed below 0.3 g， to solve the softness of the brake pedal feel in the vehicle development. Firstly， the survey data of users’ new cars performance and the voice of customer (VOC) were used to obtain the customer concerning performance index. Secondly， the relationship be- tween the above index and the brake deceleration was acquired by means of brake performance tests. The exper- imental result was analyzed to ensure target values. Thirdly， the optimal plan for brake system was determined by development experience as well as the Pugh concept selection. Finally， the control factors and noise factors were analyzed and identified. The optimal values of the brake pedal force and brake pedal travel were obtained by orthogonal experiment. The result showed that the optimal values were well consistent with the target values， which may provide an economical and effective way to optimize brake pedal feel further.