Abstract：The activity of Zhangjiakou-Bohai fault zone was analyzed with GPS data by cluster method.The analysis result shows that the crustal movement of Zhangjiakou-Bohai fault zone is the strongest in the Capital Circle region. The spatial noising was weakened by wavelet analysis and the fault movement model was given, and then the conclusion is drawn as follows. The slip rate of Zhangjiakou-Bohai faults is about 0.5 mm/a, the strain of footwall is similar to that of hangwall. It changes with timealternating translation in Zhangjiakou-Bohai fault zone from locked to slipped or from slipped to locked, and appears to be spatial alternation of strain accumulation in both side of the fault zone.
