In　this　study,　wheat-straw　lignocelluloses　were　liquefied　in　liquefaction　solvents.　Polyethyleneglycol　400　(PEG　400)　and　ethylene　glycol　(EG)　were　used　as　main　liquefaction　solvents.　The　effect　of　liquefaction　time　and　liquefaction　solvents　on　the　properties　of　liquefied　products　was　investigated.　As　the　reaction　time　increased,　the　hydroxyl　value,　residue　content　and　viscosity　decreased,　and　the　acid　value　decreased　gradually　in　the　previous　period　of　time　then　increased.　The　optimum　liquefaction　conditions　were　as　follows:　wheat-straw　lignocelluloses　with　steam-explosion　pretreatment,　the　main　liquefaction　reagent　of　PEG　400,　auxiliary　liquefaction　solvents　of　glycerin,　catalyst　of　sulfuric　acid,　liquefaction　temperature　of　150°C,　liquefaction　time　of　4　h.　The　hydroxyl　value　of　liquefaction　product　was　206　mgKOH/g,　the　residue　content　was　0.19%　and　the　viscosity　was　88　mPa.s.　©　(2012)　Trans　Tech　Publications.