Abstract: Due to the influence of dynamic pressure and periodic weighting caused by mining in fully mechanized caving face, the roof of transport crossheading in 40108 fully mechanized caving face of Dafosi Coal Mine has larger deformation. Insufficient strength of roof support leads to serious deformation of the overall transport crossheading, so it affects the safety production. According to the research results of failure law of transport crossheading, the surrounding rock transport crossheading repair support design and on-site implementation are completed. The studies show that the repair scheme of transport crossheading is reasonable and effective, the further deformation failure of the roadway surrounding rock is suppressed, and the expected support effect is achieved and ensured the safe mining of working face.