Abstract: Due to the situations of large reserved width of coal pillar and excessive waste of resources in Anyuan Coal Mine which used the conventional rock move influence area calculation method, based on the specific circumstances at 4205 and 4206 working face, this paper applies the formula of yield region to calculate the width of coal pillar. And through the comparative analysis with conventional calculation and verification with numerical simulation, the result show that the size calculated by yield formula is more rational and resources saving. The results can provide some references for the rational reserved width at working face in Anyuan Coal Mine.