Abstract: In order to study the reasonable supporting mode of 703 working face mining roadway in Zhangjiazhuang Mine and improve the stability of surrounding rocks，the paper analyzed supporting mechanism of thin seam half-coal rock mining roadway with the field engineering background, and determined surrounding rock flexible range by the combination of drilling video and non-metallic ultrasonic testing，analyzed the influence of different row spacing on roadway deformation and failure situation with simulation，obtained the reasonable supporting mode. According to field observation，the rationality and feasibility of "metal net+steel joist(wood plate)+screw-thread steel bolt" combined support technology was verified.