Abstract: air curtain formed by high-pressure air can effectively solve the contradiction underground ventilation and transport, in order to improve the efficiency of air curtain cutting off air flow, the effects of sex factors and five levels on mine air curtain cutting off roadway were investigated orthogonal experiment. All the experiments are completed by Comsol software. The results show that the most influential factor is the emission angle, and the distance between air curtain return air outlet and exit port also has a greater impact on cutting off effect, cutting off capability of air curtain increased greatly with improved spaces.