Abstract: With the promotion and application of bolting technology,the traditional method of remaining big coal pillar in gob-side entry driving gradually replaced by remaining small coal pillar,and the method remaining small coal pillar for supporting the roadway has became one of the main development direction of gob-side entry driving technology.Aiming at the No.2 coal seam of Kanghe coal mine,with theoretical calculations and numerical simulation analysis,this paper obtained that the reasonable width of the coal pillar in gob-side entry driving was 6 m.Finally,the application test shows that roadway surrounding rock deformation has been effectively controlled,and roadway maintenance effect is good.