Biomass fuel is a kind of renewable energy, and most of the biomass raw materials are agricultural and forestry wastes, which can be seen everywhere. If not treated, it will pollute the environment. Tested by relevant departments, the gas emission of biomass boiler is per cubic meter 1.3g, and the content of sulfur and nitrogen is 80mg, which meets the national first-class standards. The environmental protection effect is outstanding. The ash produced by burning straw can be used to fertilize farmland, which is rich in nitrogen and suitable for crop growth. Moreover, centralized collection can beautify the environment and have an environmental protection effect. Under normal circumstances, it is unreasonable that vegetation straw is burned and wasted. It will also pollute the environment and cause smog, which can be collected and sold, and it is also an income for farmers. Biofuels can not only reduce costs, but also reduce environmental pollution. Straw fuel is a kind of biofuel. It uses a straw fuel granulator to make sawdust, corn stalks, peanut shells, straw, cotton stalks, branches, edible fungus waste and cow dung into high-density combustible high-quality particles. Treating "waste" with "waste" in biomass-fired boilers has become a new direction of zero carbon emission, environmental protection and energy saving. It is understood that biomass fuel boilers are designed for wastes in various processing industries. The main fuels are waste wood, rice husk and corncob. According to incomplete statistics, only China and Zhejiang provinces can use biomass of120,000 tons every year, which is equivalent to saving 6 million tons of standard coal every year. At present, most of such surplus materials in China are disposed of in disorder, which is a great pity. Biomass fuel boiler can not only treat waste, but also reduce fuel cost, realize zero carbon emission and generate new energy for environmental protection, so it has been widely concerned.