Aiming at the dynamic stress changes of roadway driving along goaf in mine, we use the method of drill cutting to get the dynamic change characters of seam stress along the strike direction of roadway and analyzed the variation characteristics of roadway driving along next goaf in Zhangshuanglou Coal Mine. According to the observation and analysis, it is shown that the peak of coal stress affected by lithology, geological structure and the "O-X" broken feature of roof, appears periodically; and the cycle length is equal to the periodic weighting step distance. Effected by the stress state of surrounding rock, the new stress distribution induced by the roadway excavation and the overlying strata movement, the solid stress of coal in roadway driving along goaf varied with reduction, increase or transfer. The stress variation characteristics can be used to guide pressure relief plan of rockburst and rockburst prevention and control work significantly.