Abstract:Systematic analysis models were developed and set up according to actual phenomena, including inter-seismic and co-seismic dislocation deformation of fault, single fault and parallel fault system action in inter-plate, fault activity, and seismic risk analysis, etc. Actual examples show that fault action parameters and their changes in the area or along faults can be obtained by the models using crustal deformation data, including various kinds of information on co-seismic displacement and de-locking depth of Longmenshan fault zone, harmonizing action between Longmenshan and Longriba fault zone after the Wenchuan MS8.0 earthquake, spatial distribution of deformation gradient in Zhangjiakou-Bohai tectonic zone and its adjacent region, locking degree distribution along the tectonic zone, etc. Not only is the availability of the models proven, but research on the tectonic action of the fault system and its surrounding area can be enriched by the models.