Abstract: In order to study the influence of negative pressure in high suction roadway on gas control in goaf and to find the optimum suction parameters, the vertical height and horizontal distance should be 25 m and 20 m respectively in Zhaozhuang Mine 1309 working face. Fluent software is used to carry out numerical simulation under different negative pressure conditions of high suction roadway, and UDF program is used to define the parameters of goaf to make the simulation results close to reality. The simulation results show that the maximum gas concentration in the upper corner of the working face can reach 18% under the condition of no extraction model, which affects the safe mining. Under the condition of high suction roadway, the negative pressure of suction is increased, the gas concentration in goaf decreases, and the low gas concentration area near the upper corner expands gradually from nonexistence. The increment of gas volume fraction and extraction volume of high drainage roadway tends to be gentle after suction negative pressure is higher than 20kPa. In order to ensure the effect of extraction while avoiding the air leakage in the goaf, the reasonable suction negative pressure is determined to be 20kPa. The average amount of gas extraction in the high drainage roadway is 43.93m3/min on the spot, which is basically consistent with the simulation results.