Wood pellets are also called biomass pellet fuel, and their combustion efficiency exceeds 80% (about 60% higher than ordinary coal combustion efficiency). It produces less sulfur dioxide, ammonia nitrogen compounds and dust, which meets environmental protection requirements. The principle is to compress biomass raw materials at high temperature and make them into granules for easy storage, transportation and use. Biomass pellet machines can produce pellets of different specifications to meet the needs of different users. Biomass raw materials come from a wide range of sources, including agricultural waste, forestry waste, livestock and poultry manure, etc. These wastes can be converted into biomass energy to achieve resource recycling.