The invention discloses an automatic spheroidization device for producing spherical graphite, which mainly comprises an automatic material supply device, a powder system, a spheroidization system, a dust recovery system and a material collection system, wherein materials enter the powder system from the automatic material supply device and after being processed, and enter the spheroidization system and the material collection system in turn; the whole process is carried out in a sealed pipe in sequence; a vacuum exhaust fan is used for providing power; and in a production process, the efficiency is high and no pollution is generated. The device can realize the fully-automatic control in a whole process from material supply to powder making to spheroidization to separation to product recovery to dust recovery; the prepared graphite powder is spherical material; the surface of the graphite powder has openings; the values, which are preset before production, of the tap density, specific surface area and size distribution can be achieved; the product quality is stable; the yield can be improved by more than three times; over 40 percent of energy can be saved; over 60 percent of cost can be saved; and dust leakage and high noise are prevented.