The twin-roll extrusion granulator is suitable for producing high, medium and low concentration compound fertilizer npk production line. It has the advantages of advanced technology, reasonable design, compact structure, novelty and practicality, and low energy consumption. At the same time, it plays an important role in the compound fertilizer production line. The shape and size of the ball socket formed by one-time rolling on the roller sheet can be customized according to customer requirements. And there are many choices, pillow shape, semicircle shape, stick shape, pill shape, walnut shape, flat spherical shape and square bar shape. In addition, it can work at normal temperature, but the granulation rate is as high as 85%.