Abstract: In order to reveal the strata behavior laws of isolated short wall coal pillar fully mechanized caving face, taking 43M1 coal pillar working face in Wangzhuang Coal Mine as an example, based on theoretic analysis and numerical simulation and field measurement, this paper discusses weighting features and the form of roof breaking form and two sides abutment pressure and the advance abutment pressure. The influence of two factors including "isolated" and "short wall" on strata behavior laws was analyzed with numerical simulation software. The field measurement results are well agreed with theoretical calculation and numerical simulation.