Abstract: On March 29, 2022, an M_S4.3 earthquake occurred in Danling County, Meishan City, Sichuan Province. This event took place near the Xiongpo anticline at the southern margin of the Sichuan basin, with a focal depth of 3.5～5.5 km and a moment magnitude (M_W) range of 4.06～4.15. To investigate the seismogenic structure of this earthquake, we conducted integrated analyses of the regional historical seismicity and major fault activity. We referenced the focal mechanism solutions inverted by the Sichuan Earthquake Agency, examined seismic rupture characteristics and stress field orientation, and combined high-resolution satellite imagery with Digital Elevation Model (DEM) data to analyze tectonic deformation and fault activity. The seismic profile data were also used to identify key fault zones and delineate their geometric and kinematic features. The research revealed that the focal mechanism solution of the March 29, 2022, M_S4.3 earthquake indicates left-lateral strike-slip faulting. Nodal Plane I (NW-striking, dip angle 79°～87°) is considered to be the more probable seismogenic plane, the orientation of which is nearly perpendicular to the regional dominant structure, the NE-trending Xiongpo anticline-Pujiang-Xinjin fault. This plane represents a high-angle, near-vertical tear fault (strike-slip fault), formed by differential thrusting of adjacent blocks due to stress transfer following the 2008 Wenchuan earthquake and the 2013 Lushan earthquake. The spatial distribution of the aftershocks provides evidence to indicate that the Danling earthquake probably activated local stress adjustments along the Pujiang-Xinjin fault. This event highlights the control of stress transfer in orogenic forelands over the activity of hidden faults in intraplate tectonic settings, thereby providing new insights for assessing seismic hazards at basin margins.