Abstract: Aiming at the problem of reasonable width determination of the narrow coal pillar of gob-side entry driving in NO.7603 island working face of Wuyang Coal Mine, by using the methods of theoretical calculations and numerical test analysis, it studied the lateral stress transmission and distribution law of the goaf, the force distribution of different width coal pillars, the force conditions of surrounding rock in the mining roadway and the relationship between surrounding rock deformation and coal pillar width.