Abstract: It is the important content of the application of quality function deployment(QFD) that the target of user requirement is objectively reflected in the characteristics of product quality technology.According to the target value of user requirement and the house of quality information in QFD, the method for parallel optimization based on the improvement rate of product quality technology characteristics is put forward.As an example, the parallel optimization model of the quality technical characteristics for check valves is built up, and the improvement rate of the optimum quality technical characteristics of the valve is obtained.As a result, the scientific evidence for decision-making can be attained for the improvement of this product design by using the method of QFD.