Abstract: The calibration of onboard accelerometer using dynamic method and the simulated orbit is studied in detail.Based on the calibration results from different reference gravity model,integrating the satellite orbit again and compared to the simulated orbit respectively,the maximum difference is on the order of meter,which shows that the impacts of the reference gravity model on the calibration of accelerometer cannot be negligible.The further investigation demonstrates that a better strategy is to calibrate the accelerometer and estimate gravity model parameters simultaneously to remove the aliasing error of the reference gravity model.