A　composite　ultrafiltration　membrane　with　a　thin　hydrophilic-layer　was　prepared　by　interfacial　polymerization　of　poly(vinyl　alcohol)　(PVA),　piperazine　and　terephthalyl　chloride　on　the　polyether　sulfone　(PES)　support　membrane.　The　effects　of　the　ratio　of　two　monomers,　piperazine　and　terephthalyl　chloride,　the　concentration　of　SDS,　sodium　carbonate　and　polyvinyl　alcohol　(PVA)　were　investigated　on　the　best　composite　membrane　performances.　Infrared　spectra　showed　that　PVA　exist　in　the　surface　layer　and　the　polyamide-PVA/PES　composite　UF　membrane　with　better　water　flux　and　anti-fouling　to　protein　and　oil　was　obtained　when　it　was　compared　with　polyamide/PES　composite　without　PVA.