Abstract: The geo-stress distribution and damage condition in outburst coal seam of complex geological structure plays an important role on gas occurrence state and gas pressure gradient distribution.The geo-stress distribution and coal failure laws of outburst coal seam of complex geological structure are analyzed by rock mechanics simulation software in rock cross-cut coal uncovering regions of Liwangmiao Coal Mine -1152 and Tanjiachong Coal Mine 236-80.The results show that the horizontal stress concentration easily occurred in coal seam roof and floor strata of the large curvature position, the horizontal stress in tectonic area coal seam presents vertical layer distribution, which leads to the phenomenon that coal seam layered damage and outward ejection appears in the process of coal and gas outburst; There is a stress gradient changes of inflection point in alar part area near the anticline or syncline axis region and this point stress changes obviously; The stress neutral surface appears in anticline axis of fold, the coal nearby alar part area of neutral surface is damaged firstly and most seriously.