Abstract: Based on the analysis of special stress environment and mechanics structure of surrounding rock of driving roadway along small pillar,applying theoretical method to calculating deformation and instability of arc triangle section.It was obtained that controlling deformation and instability of surrounding rock should improving mechanical properties of rock by applying pre-stress anchored bolt（rope） with high strength.Taking 13318E roadway driving face along small coal-pillar under thick sand-stone roof in Xieqiao Colliery,roadway deformation rules in driving and mining phrases was analyzed.Results showed that advanced stress concentration was the main factor of surrounding rock in mining.Deformation rule of roadway along small coal-pillar might provide reference for similar engineering.