Tip-tilt mirror (TTM) is an important device used to maintain beam stability and eliminate wavefront tilt aberration, in order to achieve more accurate and stable control of the TTM, it is necessary to obtain a more accurate model of the TTM. In this study, the model identification and error rejection bandwidth of the TTM are measured with voice coil actuator TTM and imaging camera. First, the model of the TTM and the identification method based on pseudo-random response-impulse response estimation are introduced. Then, the timing sequence using the camera as the position sensor output and the results of the identification experiment are analyzed. The experimental results show that the identification results can better match the experimental data. After obtaining the identification model, the error rejection capability of the TTM beam stabilization system is tested under different frequency disturbance and the error rejection bandwidth of the system is 48 Hz.