Abstract: In order to master integrate anti-reflection technology of super high pressure hydraulic cutting of No.3 coal seam of Tunliu mine field,improving drilling gas drainage efficiency,and then coal output of single cutting under rational slotting pressure and time,gas drainage effect was inspected in field.The experiments showed that the rational slotting pressure of No.3 coal seam was 90MPa,coal output about 0.32t at single slotting 7min,and its slotting radius could arrive 1.45~1.62m,drilling gas drainage was perfect,and it reference for similar situation.