Currently, there are two main types of biomass pellet machines commonly used in the industry, namely flat membrane pellet machines and ring membrane pellet machines. Flat membrane pellet machines adopt structure and technology, which is relatively simple flat membrane technology, but has certain selectivity for materials. , the price is relatively cheap and suitable for users who do not have high requirements for density and output. The ring grinding pellet machine is currently the mainstream model for processing biomass particles in the industry. It is suitable for most users. It uses centrifugal ring grinding technology to ensure uniform discharge. It has large output, strong material adaptability, high particle forming rate, equipped with automatic lubrication system, low failure rate, and can work continuously.