Abstract: To solve the problem of over-limit gas concentration in the upper corner of the 11615 working face in Qinglong coal mine, gas extraction is carried out by using high-level directional long drilling gas drainage technology, combined with the actual gas occurrence of working face.The relationship between the drainage effect and the distance of borehole far away from the return airway is compared.And the relationship between the gas drainage effect and the mining distance is studied.Further, the gas drainage laws of the high-level directional long drilling are summarized.The research results showed that during the mining process, the gas in the overburden strata is drained by high-directional directional long drilling, and the corner gas concentration in the mining face is reduced from 0.25% to 0.35%, which solved the problem of corner gas concentration exceeding the limit in the working face; when the distance between the borehole and the return airway is 40 m, the drainage gas concentration is basically stable at about 18.5%; which indicated that the drainage effect is the best.With the increase of the mining mileage, the drilling drainage effect is also increasing, but it decreased at the end of drainage stage.The high-level directional long drilling has played a certain role in reducing the gas in the goaf and the upper corner of mining face, and improved the gas management efficiency during the mining process.