1、Cooling the granules of high temperature and high humidity with countercurrent principle, avoid shock cooling phenomenon resulting from the direct contact between cold material and hot material , so prevent the granules' surface from cracking effectively; 2、Adopting the slideable layout system, which is steady and reliable in movement, small in residual; 3、Octagonal cooling box reduce the corner residues effective; 4、New type rotary feeder, ensure the material in uniform thickness. 5、After cooling, the pellet temperature is no higher than 3-5 celsius degree of room temperature , so extend its storage time. 6、Adopting advanced material level control, which is high degree in automation.