Abstract: The blends low-density polyethylene(LDPE) and lignin were compatilized by the graft copolymer of maleic anhydride(MAH) onto low-density polyethylene.The effects of LDPE-g-MAH contents on thermal properties,FTIR spectral analyses mechanical properties, rheological behavior and morphology of LDPE/lignin blends were investigated.The results of TG-DSC indicated the addition of compatibilizer decreased melting temperature, improved thermal stability.FTIR elucidated the existence of an intermolecular hydrogen-bonding interaction between lignin and LDPE-g-MAH.Rheological behavior analysis for the blends demonstrated that the blends were processable.Scanning electron microscopy (SEM) micrograph showed that the compatibilizer LDPE-g-MAH could improve the dispersity of lignin in LDPE and reduce the dispersed phase size.The introduction of LDPE-g-MAH effectively improved the mechanical properties of LDPE/lignin blow film.When mass ratios of lignin, LDPE and LDPE-g-MAH were 25/75/10, the blow film had excellent mechanical property.