Taking the 3302 working face of Luning Coal Industry as the engineering background, the theoretical analysis and numerical simulation methods are used to compare and analyze the extraction effects of three kinds of gas extraction methods, such as combined extraction of high-level buried pipe and ground drilling, combined extraction of high-level drilling and ground drilling, and combined extraction of high-level buried pipe and high-level drilling. The combined extraction of high-level buried pipe and high-level drilling is the best solution. The results show that the field test is carried out in 3302 working face. Through the field monitoring of the gas concentration in the upper corner during the mining process of the working face, the maximum gas concentration in the upper corner is only 0.77 % in two months, and the combined extraction effect of high-level buried pipe and high-level borehole is good.