When Floor rock roadway influenced by mining influence，with large roadway deformation quantity，difficult Maintenance，10414 transportation floor gas extraction roadway of Yangliu Mine of Huaibei Mining Industry Group was taken as example，supporting method and the law of mine pressure appearance of floor roadway influenced by mining were studied. Floor roadway surrounding rock distribution law was got by theory analysis，numerical simulation，the floor roadway deformation broken mechanism was got，the measures of controlling roadway deformation was correspondingly put forward，the practice showed that the roadway deformation was small，with good control effect.