Surrounding rock deformation control of gob-side entry is the technical difficulty of roadway control. The greater the thickness of coal seam mining and the higher the strength of overlying rock, the greater the difficulty of gob-side entry deformation control. Aiming at the problem of dynamic pressure control of gob-side entry in large mining height working face of Yushupo Coal Mine, the mechanical model of lateral hanging plate structure of gob-side entry is established. The theoretical analysis shows that the maximum lateral hanging roof length of main roof is 4.69 m, and the maximum strain energy density of main roof is located at 5.51 m in coal pillar, which is 2.831 × 106 J/m3, and the accumulated strain energy of main roof is 3.269 × 107J. By means of numerical simulation, the development of plastic zone, deformation law and stress distribution characteristics of surrounding rock in goaf roadway are further analyzed. It is found that the supporting stress of goaf coal pillar can reach more than 35 MPa, which is the main factor causing the large stress of bolt and cable in roadway coal pillar and the deformation and failure of coal pillar. The comprehensive technical means of “pressure relief hole + lateral roof cutting” is used to control the dynamic pressure roadway in the field. The diameter of the pressure relief hole is 108 mm and the depth of the hole is 7 m. The hydraulic fracturing hole is divided into L hole and S hole, the aperture is 60mm, the spacing is 8m, the vertical fracturing height is 50 m and 30 m respectively, and the water injection rate is 80 L/min. The field practice shows that compared with the section without pressure relief measures, the deformation of surrounding rock of roadway is reduced by more than 30%, and the floor heave of roadway is obviously controlled.