Abstract: Taking the gob-side entry retaining in 18205 working face of Tunlan Coal Mine as engineering background, the paper introduces basic support in roadway, strengthening support and roadside supporting design in detail. FLAC^3D numerical simulation is used to analyze the monitoring data of deformation during various stages from driving, retaining to reusing. By numerical simulation, the fundamental principles of roadway deformation are summarized, which provides rational explanation and supporting suggestions for different stages deformation.