Steam or compressed air can be used as working medium for steam-air hammer, but the features of medium, apply work ability and apply work efficiency are different. Of them compressed air can make better use of energy. 蒸汽-空气锤可采用蒸汽或压缩空气作为工作介质。但介质性质、作功能力以及作功效率是不同的,从能量利用效益出发,采用压缩空气较好。