Abstract: This paper uses the 30 SAR data before the occurrence of the Xinmo landslide and 36 SAR data after landslide occurred to monitor of landslide and surrounding area deformation. The results show: ①Before the occurrence of the Xinmo landslide, no obvious deformation was detected at the foot of the slope, but the source area showed obvious signs of deformation.The main deformation occurred in 2016 and 2017,the source area experienced the process of ”slow deformation-acceleration-temporary stabilization-re-acceleration”. ②After the occurrence of the Xinmo landslide, an unstable deformation area is formed in the southeastern part of the accumulation area. Its cumulative deformation is large. The rainy season has a tendency to accelerate deformation.It has not yet reached steady state. ③Analyzing the deformation law before and after the Xinmo Village landslide, the surface deformation is obviously affected by the rainy season rainfall.