Abstract: The 22^# coal of Bulianta Coal Mine belongs to class I inflammable coal seam, and 22307 working face turns up varying degrees of low oxygen phenomenon in the mining process. “U” type pressure balancing ventilation measure is used to effectively solve the problem of low oxygen, and the technology ensures the safe mining of working face. This paper introduces the principle of working face pressure balancing ventilation, system configuration of pressure balancing and related issues should be noted in the using process.