Abstract: The seismogeological background and seismic activity in Qingdao and its adjacent area are analyzed.Combined the focal mechanism of small earthquakes in the region, the relation between time sequence variation of P and T axes and earthquake activities in adjacent area is studied.The results show that the occurrence of strong earthquakes can cause the variation of P and T axis direction.The variation of P and T axes is synchronous, but the magnitude of P axis change is more obvious.