Flat die series granulators are generally divided into two pressure wheels or multiple parallel pressure wheel granulators in China, which are mainly suitable for organic fertilizer granulation. For example, although it can also be made as fuel pellets, it is not suitable because of the great wear and tear on the machine, which increases the cost. In response to this problem, on the basis of learning from foreign advanced technology, China has developed a conical pressure wheel pellet machine, which is different from the two pressure wheel series in the following points, the model of the pressure roller adopts oblique wheel. And the two ends and the inner and outer ring of the mold plate line speed do not appear the dislocation friction between the wheel and the mold, which reduces the resistance, reduces the kinetic energy loss, and prolongs the service life of the mold, which is a major difference from similar compression molding equipment. The technology is very advanced today.