Abstract: Abstract: To improve a series of safety questions caused by large areas of hanging arch on steep working face, the paper was based on 26221 face of 2130 coal mine in Xinjiang Province, problems such as abnormal increase pressure of mining face roof and roadway surrounding rocks, roof falling and rib spalling accidents occurred frequently, hydraulic support slipping and falling on working face were studied, thinking and principle of hard roof control on steep working face was mainly analyzed, main program of super-deep hole’s advanced presplitting blasting was determined. The maximum length of the hole in transportation tunnel was 95m, strata pressure action law and roof caving effect showed the program was safe and reliable.