The invention provides an environment-friendly granulator. A first auxiliary press roller ring is arranged on the inner side of an outer press roller ring, and multiple first stirring teeth which penetrate two sides of the peripheral face and are mutually parallel are formed on the peripheral face. In this way, when an outer press roller and an inner press roller rotate around a spindle, one ends, close to the spindle, of the first stirring teeth and one ends, away from the spindle, of the same are different in linear speed, the ends, close to the spindle, of the first stirring teeth are more prone to sliding relative to a granulation raw material to generate backward swing force, and the first stirring teeth after inserting the granulation raw material during advancing the granulation raw material on the inner sides of the outer press roller and the inner press roller towards the outsides for the same to roll. Therefore, the environment-friendly granulator is more conducive to the granulation raw material to enter a workstation for rolling, and production efficiency is improved remarkably.