An efficient gas liquid separator is needed in industrial application for separcation of gas liquid mixed media so as to purify,recover or detoxify mixed gas liquid media.The paper in detail introduces the working principles of gas liquid separation and the advantages and disadvantages of different gas liquid separators,structural design scheme,working patterns,parameter selection,and the separation characteristics of the positive-pressure efficient gas liquid separators in industry.Industrial application shows that the efficiency is high,the capacity is great,the occupation area is small,the installation and maintenance is convenient for the positive-pressure efficient gas liquid separator.The device is worth promotion.