The co-pyrolysis ofBHTK and CYFL was studied in fixed bed and fluidized bed. The effects of heating rate and mixing ratioon co-pyrolysis were investigated in fixed-bed experiment. The results shows that with the increase of heating rate, the weight loss rate in⁃creased, showing a simple addition trend of single pyrolysis, and the synergistic effect of co-pyrolysis is not obvious. The effects of tem⁃perature and mixing ratio on the product distribution and the synergistic effect of co-pyrolysis oil were investigated in the fluidized bed ex⁃periment.The results shows significant synergy that when the reaction pressure is 0.1 MPa, conveying gas 15 L/ min, flow gas 25 L/ min,feed rate 1.5 kg/ h and N2 atmosphere, the mixing ratio is 30%( BHTK weight ratio), the oil yield is 18.75% at 600 ℃ , and synergisticeffect has the maximum 39.30%.Compared with coal tar, the content of S decreased from 0.6% to 0.38%, the content of C decreased from82.00% to 72.28%, and the H/ C increases from 0.095 to 0.099. The quality of oil improves significantly, phenolic compounds are main⁃ly concentrated in 3-cresol (21.80%), phenol (16.43%), 2,4-dimethylphenol (13.15%), catechol (12.53%), and naphthalene com⁃pounds are mainly concentrated in 1 - methylnaphthalene ( 45. 69%), alkylnaphthalene ( 19. 43%), and 2, 6 - dimethylnaphthalene(10.75%) and other kinds of compounds for extraction using.