Air shower used in microelectronics, optoelectronics, semiconductor, pharmaceutical, food, chemical, aerospace, automotive, printing, laboratory and dust-free workshop, ladder cleanliness workshop dust-free workshop, from low cleanliness in the process of the room into the room with high degree of cleanliness, removal of dust particles, each part of the people is greater than 0.3 microns so as not to bring pollution into the clean house.