The invention relates to a green grass drying machine which comprises a support. A drying barrel is arranged on the support, a net-shaped stirring barrel is arranged in the drying barrel and is connected with a motor through a rotating shaft, an ash collecting hopper is arranged at the bottom of the drying barrel, a hollow arc air bellow is arranged at the upper portion of the stirring barrel in asurrounding manner, the inner surface of the air bellow is provided with a plurality of air spraying nozzles communicated with an inner cavity of the air bellow, an air blower is connected to the airbellow through an air inlet pipe, a heating device is arranged on the air inlet pipe, an air inlet of the air blower is connected with a connecting pipe, a gas-water separating device is arranged onthe connecting pipe, and the connecting pipe is communicated with the drying barrel through a dust removal device and an air outlet pipe; and the dust removal device comprises a plurality of water tanks, the end of the connecting pipe is arranged at the top of the interior of the water tank at the right end, one end of the air outlet pipe is connected with the drying barrel, the other end of the air outlet pipe is arranged at the bottom of the interior of the water tank at the left end, and the adjacent water tanks are connected through 7-shaped guide pipes. The green grass drying machine hasthe beneficial effects that the drying efficiency is high, the effect is good, dust on green grass can be well removed, and the heat using efficiency is high.