Abstract: The coal-based environmental-friendly rubber oil was prepared using the raffinate oil of coal tar hydrocracking tail oil．The combined process of hydrodewaxing and solvent extraction was adopted to reduce the pour point and remove the polycyclic aromatic hydrocarbons in the raffinate．The results showed that the pour point of the raffinate was decreased from 26 ℃ to －6 ℃ at 5.0 MPa，350 ℃，mass space velocity of 1.0 h^-1 and volume ratio of hydrogen to oil of 800∶1．Two-stage countercurrent extraction test was carried out for the fraction with boiling point higher than 300℃ in the oil after hydrodewaxing by two-stage counter-current extraction with furfural as the solvent at extraction temperature of 60 ℃ and the mass ratio of the agent to oil of 2∶1．The eco-friendly rubber oil with a polycyclic aromatic hydrocarbons content of 1.88% and a value of aromaticity (CA) of 12.0% was prepared．The main properties meet the requirement of environmental-friendly rubber oil A0709 in the national standard GB/T 33322—2016．

Key words: environment-friendly rubber processing oil, hydrodewaxing, solvent extraction, coal-based hydrocracking tail oil, polycyclic aromatic hydrocarbon