Abstract: In order to solve the maintenance problem of gob-side entry driving of small coal pillar under the condition of strong dynamic pressure in large mining height working face, the 1106 gob-side entry driving in 1102 large mining height working face of Fusheng Coal Mine was taken as the research object. By means of theoretical analysis, numerical simulation and field measurement, the influence of goaf side roof fracture on surrounding rock stability of small coal pillar roadway protection was studied. The calculation model of the side roof fracture and the coal pillar load of gob-side entry driving was established. The relationship between the coal pillar load and the roof fracture angle of the goaf is linearly increasing; based on the principle of pressure relief by roof cutting and gob-side entry driving, the method of roof cutting is put forward to reduce the coal pillar load and achieve the pressure relief effect; it is calculated that the width of the coal pillar of gob-side entry driving in 1106 working face is 8.0 m, the effect of roof cutting are analyzed by numerical simulation, it is concluded that the peak stress of small coal pillar and coal side of roadway is reduced by 23% after roof cutting, and the deformation of the roof, floor and two sides of the roadway is effectively controlled; the roadway protection technology of small coal pillar with pressure relief by roof cutting is evaluated on the spot. The field application results show that the displacement of roadway roof and floor after cutting is finally stabilized at 377 mm, the deformation of the two sets is stable at about 242 mm, which is in the controllable range, and the roadway maintenance effect is good. On the whole, the safe and efficient mining of large mining height working face is realized by the roadway protection technology of small coal pillar with pressure relief by roof cutting.