Abstract: After the Three Gorges Reservoir impounded, due to the rise of ground water, the flabbiness layers in landslides will become soft and collapse when they meet water. During the running of the reservoir, the change of water level will bring huge dynamic water pressure, which leads to slides, especially when the water level approaches sliding surface. It is a brand-new ideal research on ground water change characteristics and stability of landslides to use SNMR(surface nuclear magnetic resonance). Except that a few papers have been published in our research group, there is no other reports or papers in or out of China. We take Zhaoshuling landslides in The Three Gorges Reservoir as an example to study ground water characteristics and stability of the landslides. Applying SNMR to research on landslides is a new method, and its success will not only pioneer a new way to study landslides and expand the application of NMR, but also promote the economic construction of our country. Therefore, it has both scientific significance and great practicality.