Abstract: "Thermal Dissolution based Carbon Enrichment" (TDCE) is the thermal extraction of lignocellulosic biomass wastes using non/weak polar organic solvents under mild conditions (350 °C, nitrogen atmosphere). After a series of deoxygenation and aromatization reactions, the obtained target solid products Soluble and Deposit have the advantages of anhydrous, ashless, high calorific value, etc. At the same time, this technology also has the advantages that the solvent does not participate in the chemical reaction and can be recycled and reused. Therefore, thermal solution carbon enrichment is one of the effective ways to realize biomass energy conversion. This paper firstly introduces various ways of biomass utilization at present; and then focuses on the factors affecting carbon-enrichment, reaction mechanism and product utilization pathways of biomass thermal solution. Under the background of the national strategy of "carbon neutrality", biomass thermal solution carbon-enriching technology has obvious economic value and social significance.