Polyethylene　glycol　(PEG)　non-covalent-functionalized　multi-walled　carbon　nanotubes　(MWCNT)　membrane　were　prepared　by　vacuum　filtration.　The　dispersion　and　stability　of　MWCNT　non-covalent　functionalized　with　PEG　were　all　improved.　TEM　characterization　and　XPS　quantitative　analysis　proved　that　the　use　of　PEG　to　non-covalent　functionalize　MWCNT　was　successful.　SEM　image　analysis　confirmed　that　the　pore　size　of　PEG-MWCNT　membrane　was　more　concentrated　and　distributed　in　a　narrower　range　of　diameter.　Contact　angle　measurement　demonstrated　that　PEG　non-covalent　functionalization　greatly　enhanced　the　hydrophilicity　of　MWCNT　membranes.　The　results　of　pure　water　flux　showed　that　the　PEG-MWCNT　membranes　could　be　categorized　into　low　pressure　membrane.　PEG-MWCNT　membrane　had　a　better　effect　on　the　removal　of　humic　acid　(HA)　and　a　lower　TMP　growth　rate　compared　with　a　commercial　0.01-mu　m　PVDF　ultrafiltration　membrane.　During　the　filtration　of　bovine　serum　albumin　(BSA),　the　antifouling　ability　of　PEG-MWCNT　membranes　were　obviously　better　than　the　raw　MWCNT　membranes.　The　TMP　recovery　rate　of　PEG-MWCNT　membrane　after　cross　flushing　was　79.4%,　while　that　of　raw　MWCNT-(COOH)　and　MWCNT　membrane　were　only　14.9%　and　28.3%,　respectively.　PEG　non-covalent　functionalization　improved　the　antifouling　ability　of　the　raw　MWCNT　membranes　and　reduced　the　irreversible　fouling,　which　effectively　prolonged　the　service　life　of　MWCNT　membrane.