Abstract: For studying change laws and distribution characteristics about abutment pressure of working face under jagged coal pillar, the FLAC^3D 5.0 is adopted to simulate the vertical stress filed of working face when working face under jagged coal pillar advanced to difference locations. Based on the analysis of dynamic evolution characteristics of abutment pressure in strike and tendency during working face advancing, we obtained that stress concentrated at both ends of working face under coal pillar, and the most obvious was in triangle area and formed superimposed stress in the narrowest pillar by the width changes of jagged pillar and the impact of coal pillar stress concentration.