Abstract: In mechanized Excavation Faces of Coal and Rock cutting speed directly affects the efficiency of Tunneling, the safe operation of the driving machine is the fundamental to ensure the tunneling work. Taking coal mine geological conditions and coal seam characteristics as the starting point, the paper analyzes the stress situation of coal mining machine and coal body, taking the EBZ-132 type boring machine as an example, combined with linear regression analysis to carry out t test and F test, and get the best cutting speed and time; through the fault tree analysis of roadheader accident, the probability importance degree and structure importance and critical importance degree were analyzed and put forward reasonable measures.Through the practical research and application of the safety and efficiency of the driving machine, the results show that the method has a high theoretical and practical guidance to solve the problem of low efficiency.