Abstract:Based on the data of GNSS base station and seismic slip vector in Shandong area from 2011 to 2019, we use the block negative dislocation inversion model to inverse the fault locking degree and slip loss rate in Yishu fault zone. The results show that the fault locking degree in the south of Zhucheng of the Yishu fault zone is low, and there is no accumulation of slip deficit. The north of Zhucheng of Anqiu-Juxian fault has a higher degree of fault locking, the locking depth is relatively deep, about 26 km, and the fault sliding deficit rate is about 0.6-0.8 mm/a, which is the deficit of right-lateral extrusion. At the same time, microseismicity in this area is not active, so we need to pay attention to its seismic risk.