To meet the need of calibrating the vector thrust test cell with field dynamic calibration, the paper briefly introduces the necessity of test cell thrust, analysed the error between laboratory calibration and practical use, solved the problem of vector thrust test cell holistic calibration. A pendulum bob calibration system used for calibrating vector thrust test cell is introduced. To prove the measurement scheme, the dynamic parameters are acquired by experimentations. The experimental results indicate that the calibration system's dynamic property is excellent good, it responds quickly to dynamic signals without lag or oscillation. The uncertainty of the measuring results of the dynamic calibration is 2.2%, which can satisfy the need of dynamic calibration for the vector thrust test cell.