Abstract: The comprehensive characteristics of active faults,physical mechanism of fault basins,pole direction of drainage system and fault plane solution of moderate and small earthquakes indicate that recent tectonic stress fields in the study area trend from NNW to nearly SN.It follows that local tectonic stress fields in the area is related to the tectonic deformation of upper crust,caused by slipping to the south of Sichuan-Yunnan block in which the fault basin in the area has been a pull-apart basin of the surface crust since the Neogene.The boundary faults of the basins tend to be in the form of the shovel and to be down to at a depth of 1-2 km,and moderate/small earthquakes are concentrated at a depth less than 20 km,which suggests a strain release of two sorts at different depths in the slipping process.It is possible that the lower part of the crust is in the process of being deformed to northeast between the large-scele platas.Earthquakes of >M 6 with characteristic of high-angla strik-slip mainly concetate at a depth of 20-25 km which is partly related to NE compressive stress.The intersection of large-scale and local stress fields may be representative of tectonic stress at different depths.Of course,the Hounghuo River fault zone in the presence of shear-tension obviously has an effect on shifting of the stress field direction of this region.