NOVELTY - Method of producing liquid fuel from biomass feed stock involves (a) feeding biomass feedstock into thermo-catalytic plasma gasifier; (b) cooling obtained syngas; (c) splitting syngas stream and conveying first stream to water gas shift reactor; (d) conveying second stream to water gas shift reactor; (e) reforming natural gas to obtain synthetic gas; (f) obtaining syngas comprising hydrogen and carbon monoxide; (g) carrying out Fischer Tropsch reaction of obtained syngas; and (h) subjecting wax product to hydrogen cracking process to obtain liquid fuel.    USE - The method is useful for producing liquid fuel, preferably jet fuel, diesel fuel and naphtha from biomass feed stock (claimed).    DETAILED DESCRIPTION - Method of producing liquid fuel from biomass feed stock involves (a) feeding a biomass feedstock into a one stage atmospheric pressure thermo-catalytic plasma gasifier, contacting the feedstock with oxygen or oxygen enriched air or their mixtures to convert organic components of the biomass into a syngas stream; (b) cooling the obtained syngas using heat exchanger, cleaning and removing particulate matter and chemical impurities of obtained syngas stream and compressing using atmospheric pressure; (c) splitting the syngas stream to obtain first stream and second stream and conveying the first stream to a water gas shift reactor to obtain modified syngas stream comprising carbon monoxide and hydrogen; (d) conveying the second stream to the water gas shift reactor and mixing with the modified syngas steam obtained in step (c); (e) reforming natural gas optionally by methane to obtain synthetic gas and adding the obtained synthetic gas to the water gas shift reactor; (f) obtaining syngas comprising hydrogen and carbon monoxide in ratio of about 1:1-2:1; (g) carrying out Fischer Tropsch reaction of obtained syngas to obtain wax product; and (h) subjecting the wax product to hydrogen cracking process to obtain liquid fuel. An INDEPENDENT CLAIM is included for apparatus for converting biomass feedstock into liquid fuel.