According to the circulation air flow formed by the auxiliary fanin some underground iron mine in Anhui province,the Comparative experimental study on serials parallel air curtain for controlling air flow circulation was carried out.The results showed that:The serials parallel air curtain could effectively control the polluted air circulation between two mining Level.The volume of ejected air reached 2~24 m3/s,and the polluted air could be exhausted in time,which is favorable to operation safety of trackless diesel vehicle and workers’ health in underground mine;When the air curtain worked normally the effective air volume of auxiliary fan was increased,and there was little influence to auxiliary fan;The working noise of air curtain was 82~92 dB(A),which less interfered with the working environment near by 300 m.moreover,the time of workers being exposed to the noise was short,which didn’t do harm to their health;The serials parallel air curtain whose air outlet velocity was lower than 4 m/s was installed in chambers on the two sides of transportation roadway,which didn’t influence the passerby and the running of trackless diesel vehicle.