According to the demand of the wind tunnel experiment, the aerodynamic force measurement technology using a distributed-sting-balance is developed. As an application instance, a twin-sting-balance measurement system with the function which can eliminate the internal stress of the system is carried out. Two Calibration methods for the six-component twin-sting-balance measurement system are used and discussed, which are the combination calibration method and the integration calibration method, and the verification of the reliability of the twin-sting-balance system design and the calibration methods are also conducted. The results show that the twin-sting-balance measurement system design can eliminate the inherent internal stress caused by the over-constraint of the system effectively. Besides, the twin-sting-balance system can obtain a high force measurement accuracy and precision using both of the two calibration methods, which can meet the requirement of the wind tunnel experiment. Finally, the wind tunnel experiment is conducted with the method of combination calibration taking into account the calibration capability of the calibration rig in CAAA, and a satisfying measurement precision is obtained.