Abstract: The distribution of the P-wave travel time residuals and the Ms Magnitude deviation of the Nanchang station were analyzed based on the 1024 earthquakes whose epicenter distances are between 0° and 40°. The results show that the P-wave travel time residuals were obviously affected by the azimuth angle and magnitude. The travel time residuals is up to 2.8 second within the Northeast azimuth, while the travel time residuals meet the minimum of 1.1 second at the southeast direction. The magnitude deviation is also obviously influenced by the azimuth angle. The magnitude obtained from Nanchang Station in the southeast and the northeast direction is about 0.12 lower than that of the national network, while in the southwest is about 0.08 higher than that of the national network. There is no obvious relationship between the focal depth and the P wave travel time residuals and the magnitude deviation.