The satellite navigation system has advantages of high-precision, all times and wide-range. The high-precision velocity message including in navigation message can be resolving by specific arithmetic. According to the characteristics of carrier tracking loop and tracking parameters. This paper compares the Doppler velocimetry and the Carrier Phase velocimetry in theories. Experiments show that the Carrier Phase velocimetry is better than the Doppler velocimetry has orders of magnitude increase. The theories and analysis is basically consistent.