Abstract Controlled by absolute gravity data, mobile gravity data of western Yunnan network from 1985 to 2010 are processed with adjustment of average accuracy of 12×
10 -8 ms -2.The characteristics of single point gravity variation curve are with seasonal fluctuation and trend movement(up or down) in longterm. The gravity dynamic variation of some points is consistent with preparation process of Lijiang Ms7.0 earthquake. The annual change rate of gravity from longterm observation can reflect the trend variation of gravity field in a time period. The annual change rates of gravity in 1985-1995 and 1996-2003 might reflect the energy accumulation and release before and after the Lijiang Ms7.0 earthquake. Since 2003, the rising velocities of gravity are over 10×10 -8 ms -2/a along the Jianchuan fault, HeqingEryuan fault and the northern segment of Red River Fault Zone. On the basis of the initial fault movement model, the forward simulant annual changing rates of gravity are similar with the measured values. It indicates that fault movement has great contribution to the gravity field change. The annual fault movements inversed by annual change rate of gravity are consistent with the geological results, and basically reflect its active characteristics
