The invention discloses an inverted tooth chain output transmission device for a snow caster, relates to an output transmission device for the snow caster, and solves the problems of easy slipping, easy fatigue stretching, low transmission efficiency and small torque of transmission of a vee belt, and easy damage, short service life, low efficiency and high maintenance cost of transmission of a reduction box. An air-cooled two-cylinder diesel engine is arranged on a main framework, and an output shaft of the air-cooled two-cylinder diesel engine is provided with a driving toothlet chain wheel; two ends of a transmission shaft pass through a bearing seat and are fixedly connected with a drive small chain wheel; a driven sprocket canine tooth chain wheel is arranged on the transmission shaft, and the driving toothlet chain wheel is in transmission connection with the driven sprocket canine tooth chain wheel through an inverted tooth chain; and a roller shaft is fixedly connected to the main framework through two pillow block bearings, two ends of the roller shaft pass through the corresponding pillow block bearings and are fixedly connected with a drive big chain wheel, and each drive small chain wheel is in transmission connection with the corresponding drive big chain wheel through a transmission chain. The inverted tooth chain output transmission device is suitable for the snow caster.