The transporting unit is one of the indispensable facilities in the biomass pyrolytic liquefaction system and the continuous and steady transporting characteristic is the key to ensure the process of biomass pyrolytic liquefaction.This paper introduces one biomass transporting system adopted in the experiment;taking sawdust,paddy shell, wheat hull and corn grain with different grain diameters as the representative materials,the influence law of various factors on transportation capacity is studied in this paper.The research results obtained can offer an important reference for realizing a continuous and reliable biomass pyrolytic liquefaction process.