Geological mechanical properties of No. 3 coal seam of 3-6012 air return roadway of Shanxi Changzhi Jingfang Mining Industry was analyzed by exploration of site and underground peephole, the roadway surrounding rock control mechanism and corresponding anchor bolt support theory were analyzed, the support and parameters of 3-6012 air return roadway were settled. The result showed that the anchor bolt support improved the stability of surrounding rock and solved the support difficulty.