A　high　efficient　hydrolysis　and　acidification　process　for　wastewater　pretreatment　was　demonstrated　in　this　study,　through　the　analysis　of　the　limitation　of　present　hydrolysis　and　acidification　processes　used　in　many　wastewater　treatment　plant.　The　novel　process　included　suspending　activated　sludge　phase,　solid-liquid　separation　phase,　biofilm　phase,　and　the　wastewater　was　treated　by　three　phases　in　sequence.　Through　the　treatment　of　the　synthesis　beery　wastewater,　when　the　ρ(COD)　of　influent　was　0.6-1.0　g/L,　more　than　50%　of　ρ(COD),　70%　of　ρ(SS)　removals　were　achieved　under　a　HRT　of　3.5　h,　and　ρ(BOD5)/ρ(COD)　of　effluent　was　increased　by　25%.　At　the　same　time,　the　effect　factors　of　MLSS　in　suspense　phase,　HRT　and　the　organic　load　of　influent　for　the　nutrient　removal　and　the　sludge　reduction　in　suspense　phase　were　studied.　In　conclusion,　the　novel　process　has　some　merits:　high　endurance　of　the　impact　from　the　influent　organic　loading,　excess　sludge　could　be　reduced　effectively　by　the　hydrolysis　and　acidification　process,　high　efficiency　of　hydrolysis　and　acidification,　occupancy　land　area　is　minor,　and　apt　to　unify　construction　and　management.