The airflow dyeing machine adopts the aerodynamics principle, and adopts circulating air instead of water to drag the dyed fabric for circular movement. Therefore, compared with the traditional spillage dyeing machine, the dyeing bath ratio is greatly reduced. There are two forms of exchange between fabric and dye in air dyeing machine: one is air atomization and the other is air pressure penetration. Air spray atomization means that the dye is firstly atomized through a special nozzle and dispersed in the air stream, and then the air stream with the spray dye is exchanged with the dyed fabric and leads the fabric circulation. In the process of exchange, the atomized dye not only has a large contact area to the fabric, but also has a strong permeation to the fabric fiber, accelerating the diffusion rate of dye into the fiber. The nozzle of the German THEN air dyeing machine takes this form. The form of air pressure penetration is two nozzles, that is, a pure air nozzle and a liquid flow nozzle. The liquid flow nozzle first passes through the nozzle for exchanging with the dye solution before and after the fabric is dyed, and then enters the air flow nozzle through the cloth extraction roller. Pressure penetration of the dye dew fabric is conducted by the air flow, which accelerates the diffusion rate of dye to the fabric in the process of pulling the fabric circulation.