Abstract: In order to grasp the space-time variation of regional strain field holistically, and to describe the regional movement field more objectively, on the basis of region with no-net-rotate datum and from the point of continuous variation, we applies multi-kernel function in filtering the repeated measurements from GPS monitoring stations in north China during the recent 10 years (1999, 2001, 2004, 2007 and 2009) in the project of China Crust Movement Measuring Network, and analyzes the dynamic variation fields. The results suggest: ① Beijing and Tianjin and their surrounding regions located in Zhang-Bo Zone are the differential motion area compared with their neighborhood, and also are depletion areas of left lateral movement,and have lasted for a long time; ② The north segment of Shan Xi fault is left lateral compressive activities and south of it is right lateral compressive, which is not completely consistent with the geological result of right lateral extension; ③ The activity of Tanlu fault is left and right lateral alternation on space, and is not totally right lateral, and in term of fault extension, this fault is ‘compressive in north and extensive in south’; ④ The region between south of Taiyuan-Shijiazhuang and north of Jinan is the obvious deformation region during the recent years.

Key words: Horizontal deformation, Multi-kernel function, Strain, Strong earthquake, North China