Features: 1) High transmission efficiency and stablity 2) Clearance between pressing roll and circular mold can be automatically adjusted 3) Users can use the automation control system to properly adjust clearance between pressing roll and circular mold according to raw material features, so as to guarantee pellet quality and machine capacity and extend circular mold pressing roll lifetime 4) Hydraulic automatic assembly and disassembly unit is applied in circular mold,dramatically reducing assembly and disassembly time and increasing circular mold assembly precision 5) Various control systems can be adapted on the machine 6) Suitable for pelletization of high quality livestock, aquatic and other materials 7) Widely used for pelletization of high quality livestock feedstuff, fish pellet feedstuff, complex fertilizer, cottonseed shell and other materials