The invention relates to the field of biological energy sources, in particular to a one-pot
liquefaction process of
biomass. The process comprises the following steps: firstly, preparing
slurry containing a catalyst, a vulcanizing agent and
biomass, and then introducing
hydrogen into the
slurry for carrying out a reaction. The
slurry is prepared by the steps of sequentially carrying out
drying, primary crushing, compressing and secondary crushing on
plant oil residue, and then mixing the product with the catalyst and the vulcanizing agent to obtain a mixture; adding the obtained mixture into an oil product, and
grinding to prepare slurry, wherein the prepared slurry is
biomass slurry with a
plant oil residue concentration of 50-65wt%. According to the one-pot
liquefaction process of the biomass, a treatment process of first compressing and then secondary crushing is carried out on the
plant oil residue for the first time, so that the volume of the plant oil residue is greatly reduced,the plant oil residue is more easily dispersed in the oil product, the content of the plant oil residue in the oil product is increased, and the concentration of a reaction material is increased; theone-pot
liquefaction process increases the biomass conveying capacity of a pump within unit time, and guarantees the smooth operation and transportation of the pump.