Sugarcane bagasse was co-pyrolyzed with lignite in a fixed bed reactor to investigate the possible interaction during co-pyrolysis. GC-MS revealed that the concentration of phenols and aliphatic compounds in the tar increased with the addition of sugarcane bagasse, while the content of aromatic compounds had the contradictory tendency. The phenol content in co-pyrolyzed tar reached 20.35%, which increased by 142.26% compared with the calculated values. The sugarcane bagasse decomposition peak partly overlapped with lignite pyrolysis peak from TG-DTG curves, which meant more interaction between lignite and sugarcane bagasse during the pyrolysis process. The difference between the experimental and calculated values of pyrolysis products yield, tar components, DTG values and kinetics analysis indicated the synergetic effect between lignite and sugarcane bagasse.