Abstract: Drilling and mechanical injury accidents are huge threat of gas drainage drilling and efficient construction in underground coal mine. Through in-depth analysis of drilling accident mainly common phenomenon and reasons such as sticking and pushing drill, drill pipe torsion fracture, deviation, connected pores, gushing and orifice in drilling rig gas drainage drilling construction in underground coal mine, on this basis, given guidance processing method, and analyze the reasons for the drilling rig construction of seven rigs common mechanical injury accidents, propose preventive measures. This paper has a certain guiding significance on safety construction of gas drainage drilling in underground coal mine.