Countries around the world are carrying out coordinated governance and management of energy and the environment to varying degrees. Straw fuel (that is, biofuel) is based on the solid waste of crops such as corn stalk, wheat straw, straw, peanut shells, corn cobs, cotton stalks, soybean stalks, weeds, branches, leaves, sawdust, bark, etc. , pressurized, densified and shaped by biomass pellet machinery, eventually becoming solid biomass pellet fuel.

Pellet fuel is made by extruding wood chips, straw and other raw materials through pressing rollers and ring die under normal temperature conditions. The density of raw materials is generally around 0.6-0.8, and the density of formed particles is greater than 1.1, which is very convenient for transportation and storage. At the same time, its combustion performance is greatly improved, reducing human dependence on petrochemical energy and atmospheric emissions.