Abstract: The drainage of high-level drilling is one of the effective measures to solve gas accumulation at upper corner. In order to deal the problems as unclear target of drainage holes arrangement, low utilization rate of drilling and shorter effective drainage in practical proces, taking a mine in Xinjiang as research object, actual drainage data of high-level drilling in No. 3 drilling yard of 4244 working face are analyzed by field observation and statistical calculation. The effective drainage height and drainage distance of boreholes are adjusted through calculation and comparison, and good gas drainage effect is achieved.