Abstract: Large deformation of roadway surrounding rock at side of goaf not only affects the normal mining, more likely to cause rock-burst. In this paper, in order to control the deformation of roadway at side of goaf, taking 7521 working face in a mine as the research background, through studying the deformation mechanism of roadway surrounding rock at side goaf by using directional hydraulic crack technology to achieve the purpose of controlling the working face lateral deformation of surrounding rock of roadway at side of goaf. The successful implementation of directional hydraulic crack measures, not only realizes the normal mining of 7521 working face, but also provides a measure for reducing surrounding rock stress concentration of roadway at side of goaf.