The invention discloses a dental gas blowing drying device which comprises universal wheels, universal wheel support rods, a device base, a device shell, a device chamber, a first filter tip, a disinfection fluid barrel, a first pipeline, a first water pump, a fourth pipeline, an air draft device and an air outlet. The dental gas blowing drying device has the advantages that clear water can be evaporated by an evaporation chamber after being mixed, the insides of gas pipes can keep clean and sanitary, harmful gas sprayed out from a gas gun can be effectively prevented from flowing into the oral cavities of patients, and accordingly the safety of the oral cavities of the patients can be protected; the dental gas blowing drying device is provided with activated carbon adsorption filter tips,accordingly, the clear water and impurities in disinfection fluid can be effectively filtered, pipelines can be prevented from being blocked, and the inside of the dental gas blowing drying device can keep clean; the dental gas blowing drying device is provided with a stirring device, a spiral blade can be driven by a second motor to rotate, disinfectant fluid in a stirring inner container can besufficiently stirred, and accordingly the problem of imperfect disinfection effects due to uneven stirring can be solved.