The invention discloses a printing machine for drying ink by circulating air, which comprises a printing machine shell and a machine base, the printing machine shell is fixedly installed on the top of the machine base, and also includes moving wheels, a temperature-controlled circulating air system, a printing press device and an ink supply box, the moving wheel is fixedly installed at the bottom of the machine base, and the moving wheel adopts a high-strength rubber silent roller; the invention has a reasonable and simple structure, and can dry the ink on the printing paper of the printing machine by circulating air to prevent Heat dissipation, energy saving and environmental protection, high printing quality, and the wind that dries the ink circulates in the air cover, so that the flowing air used to dry the ink on the paper is isolated from the ink supply box, which can avoid the accelerated evaporation of the ink in the ink supply box caused by the air flow , the filter can filter the dust and dehumidify the air in the process of circulation, to ensure the cleanliness and dryness of the air that enters the circulation air hood to dry the ink, and the heated air can be recycled to prevent heat loss, which can reduce the ink of the printing machine Drying costs, energy saving and environmental protection.