The coordinate time series of 27 base stations in the terrestrial network of Yunnan region from 2011 to 2017 were selected,and noise analysis was performed by using a combination of multiple noise models,in which the hydrological load(HYDL)three environmental load,modify the base station time series after solution,compare the optimal noise model of each station component before and after the environmental load correction. The results show that the noise characteristics of the components of the base stations in Yunnan area are different,which are mainly reflected by white noise + flicker noise and power law noise. The effect of environmental load on the vertical displacement of the reference station is more significant than horizontal. The hydrological load has become the largest factor affecting the reference station,and the maximum displacement amount reaches cm level. Analysis of the changes in the noise characteristics before and after the environmental load correction shows that the environmental load correction has the greatest impact on the U component,followed by the N component,and the E component is the smallest. The change of the noise model does not show a clear pattern in the areas.