NOVELTY - Comprehensive utilization of Pueraria thomsonii, comprises (i) crushing Pueraria thomsonii, heating and cavitation extraction, filtering, concentrating the filtrate, separating by macro-porous adsorption resin column chromatography to obtain puerarin crude, purifying puerarin by silica gel column chromatography, and crystallizing; and (ii) drying filter residue, performing spiral extrusion molding, anaerobic pyrolysis and carbonization reaction, precipitating condensed liquid, filtering to obtain vinegar liquid and coal tar, and processing non-condensing gas to obtain fuel.    USE - The method is useful for producing fuel by utilization of Pueraria thomsonii.    ADVANTAGE - The method produces puerarin to produce various high value-added products, namely vinegar liquid and coal tar, biomass carbon and fuel gas; dose not discharge waste slag, and thus it is environmentally friendly; achieves complete utilization of resources; utilizes non-toxic or low toxic solvents, namely water, ethanol and ethyl acetate; and is economical.    DETAILED DESCRIPTION - Comprehensive utilization of Pueraria thomsonii, comprises (i) taking entire plant of Pueraria thomsonii as raw material, cleaning and removing impurities, crushing, then using 10% ethanol aqueous solution as an extracting solvent, heating and cavitation extraction, filtering, and respectively collecting the residue and filtrate, drying the filter residue, concentrating the filtrate to 1/6th of the original volume, separating by centrifuge to obtain puerarin crude separated by macro-porous adsorption resin column chromatography, and purifying puerarin by silica gel column chromatography, and crystallizing to obtain puerarin; and (ii) drying the filter residue, subjecting to spiral extrusion molding, and performing anaerobic pyrolysis to obtain biomass carbon, carrying out carbonization reaction to obtain condensed liquid and non-condensing gas, precipitating the condensed liquid at low temperature, and filtering to obtain vinegar liquid and coal tar, processing non-condensing gas by using 5% sodium hydroxide in the carbonization furnace, and washing with 80% ethanol aqueous solution to obtain fuel.