Abstract: Wood liquefacient was carried out from alcoholysis of waste bottles (polyethylene terephthalate,PET) using microwave irradiation. The relationship between the rate of liquefaction and time was discussed. The results showed that wood liquefaction obeys the second-order kinetics. Liquefaction activation eneryy Eawas 1.76×105 and pre-exponetial factor A was 0.891e50.28(s·mol)/L2. Percentage content of water-solubles decreased and that of ethyl acetate-solubles increased with the increase of liquefaction time. The products of different liquefaction time and different extraction of GPC and HPLC-MS/MS analyses showed that, the relative molecular mass (Mr) of lignin pyrolysis products were 400-200. The Mr of cellulose pyrolysis products was more than 10 000. The Mr of water-insoluble products from some PET debris and re-polymerization of liquefied products was more than 10 000.The hydroxyl value, acid value and viscosity (25℃) of the products increased with the increase of time. The infrared spectra of each extract fraction had little difference.