Abstract: FLAC^3D software is used to calculate surrounding rock deformation laws of large section gob-side entry driving, and analyze the distribution and change laws of displacement, stress and plastic zones in roadway driving and the working face mining, the results show that the destroy pattern of gob-side surrounding rock is shear, the mainly destroy form is that the coal of middle and below tunnel extrudes to center; in gob-side excavating and excavated stage, the small pillar is the main load-bearing structure, in the influence of the working face advanced abutment pressure the small pillar is destroyed, at the same time pressure transfer to the solid coal side.