Abstract: We analyze the effect of approximate velocity in the formula of the rotation of the gravity potential, which is caused by the Earth rotation. We compute the difference between the satellite ephemeris's velocity and numerical integral's velocity. The ephemeris data come from GFZ's Rapid Science Orbit, TUM's Reduced-Dynamic Orbit, and GFZ's Post-processed Science Orbit respectively. The integral data are obtained based on the reference gravity field models EGM96, EIGEN2, and EIGEN-CG01C, respectively. The fitting between ephemeris velocity and integral velocity depended on EIGEN2 reference gravity field model is better than the EGM96 and EIGEN-CG01C model. The variations of velocity difference have obvious periodicity, which coincides with the satellite orbit period. When the disturbing potential of 1m2/s2 accuracy, or the approximate velocity of accuracy less 2mm/s in the formula of the rotation of the gravity potential is required, the satellite orbit data not satisfied the potential rotation computing demand are rejected from the GFZ's Rapid Science Orbit and TUM's Reduced-Dynamic Orbit. If the disturbing potential is desired 0.5m2/s2 at satellite track, the satellite velocity required in formula of the rotation of the gravity potential should be re-computed or the GFZ's Post-processed Science Orbit is adopted.