Biomass energy has the following characteristics: renewable, high calorific value, low pollution, zero emission, high density, etc. The solidification of biomass is a form of utilization of biomass energy. According to statistics, the energy stored by plants each year is about 10 times that of the world's main fuel consumption; and the amount of energy used as energy is less than 1% of the total. Biomass energy conversion technology can efficiently use biomass energy instead of fossil energy, thereby reducing dependence on fossil energy and reducing environmental pollution caused by energy consumption. Therefore, biomass energy has become an important part of sustainable energy in the future.