Based on the difficult support of close distance coal seam mining of Zhongxing Mine, transportation roadway location and support of lower coal seam of 4503 working face were studied. The result showed that when the fault distance increased, the surrounding rock stress of transportation roadway gradually grew larger, the reasonable fault distance was settled as 30 m. Combined with symmetrical support, the original support was optimized, the monitoring results showed that the top and bottom plates of the transportation roadway and the two sides of the roadway reached 241 mm and 319 mm respectively, and then tended to be stable. The roadway deformation was stable and the overall supporting effect was good.