Abstract: With the study on the mechanism of deformation and failure the-650mrailway gateway in LinNancang Mine,summarizes the main reason of roadway deformation.Design a backfill support way,through the FLAC^3D simulation calculation,the supporting method can well control the life of broken zone of roadway surrounding rock,the stress field and displacement field tends to be even,can well control the broken surrounding rock large deformation.The engineering practice proves that the simulation accuracy,the supporting form well solves the problem of deformation of soft rock roadway,guarantee the safe production in the mine.