Abstract: On basis of deformation and GPS data,the evolution process of deformation and stress field pre-and post Wenchuan M8.0 earthquake in Fujian province area is analyzed.The results show that before Wenchuan M8.0 earthquake,bounded by Jinjiang-Yong'an faults,stress field of the north of Fujian province is compress,and of the south is extension;After Wenchuan M8.0 earthquake,to the east of Changle-Zhao'an faults stress field,the stress field is compress,and to the west is extension.