Abstract The principle of velocity measurement using Beidou System(BDS)was introduced,the effects of each error correctionon on single point velocity measurement was analyzed and corresponding correction formulas were proposed.At last,the accuracy of BDS was evaluated according to the results of the experiments in which the results from dynamic velocity measurement and low dynamic velocity measurement were simulated using static data.The experiments show that the accuracy can reach cm/s in the simulation using Doppler Velocity Measurement Principle,and the accuracy can reach mm/s in the simulation using Doppler observation results derived by carrier phase.In low dynamic testing experiment,the mutual deviations between original Doppler velocity measurement results and integrated navigation equipment velocity measurement accord with cm/s level.While the mutual deviations between derived Doppler velocity measurement results and integrated navigation equipment velocity measurement accord with dm/s level.It can be concluded that the results from integrated navigation equipment are obviously affected by the motion of carriers.