The bottleneck in preparing lignocellulosic biomass liquid fuel is how to depolymerize lignin and separate the bio-oil obtained through the depolymerization.In this paper,a new technology of salting-out extraction for separating bio-oil from the liquefaction products of lignin is investigated,and the effects of the kind and dosage of inorganic salt,the equilibrium time and the temperature on the yield of bio-oil from the liquefaction products of lignin are revealed.The results show that the extraction of bio-oil is facilitated by taking saturated MnSO₄ solution as the salting-out agent,and that,under the conditions of 10 min of equilibrium time and 80℃ of extraction temperature,the bio-oil yield is up to 52.47% with a salt content of 2.76%.This new technology avoids the use of organic solvents,and thus saves the cost for the recovery of organic solvents.Meanwhile,it helps eliminate the environmental pollution and the corresponding potential risk,which results from the volatilization of organic solvents.Therefore,this new technology provides a green approach for separating bio-oil from the liquefaction products of lignin.