Substantial　discharge　of　industrial　oily　wastewater　calls　for　an　efficient　and　sustainable　treatment　for　resource　recovery.　Superwetting　membranes　offer　a　feasible　approach　to　fractionate　oil　species　and　water　from　oily　wastewater　for　addressing　this　technical　challenge.　In　this　study,　we　proposed　a　useful　strategy　for　constructing　a　superhydrophilic　membrane　with　superior　antibacterial　properties　through　rapid　co-deposition　of　dopamine　and　3-aminopropyltriethoxysilane　(APTS)　initiated　by　ammonium　persulfate　on　the　Cu　nanoparticles-loaded　porous　PVDF　substrate.　The　resultant　superhydrophilic　membrane　yielded　an　underwater　oil　contact　angle　of　163.5(degrees),　enabling　a　fast　and　robust　gravity-driven　filtration　for　various　oil-in-water　emulsions　with　a　separation　efficiency　of　＞99.9　%.　Additionally,　incorporating　of　Cu　nanoparticles　and　polydopamine　endowed　the　superhydrophilic　membrane　with　superior　antibacterial　activity　(100　%　inhibition　efficiency　against　Escherichia　coli),　and　thereby　remarkably　enhancing　the　anti-biofouling　performance.　This　study　provides　a　viable　approach　to　design　highperformance　membranes　for　separation　of　oil-in-water　emulsions,　with　promising　applications　in　the　industrial　and　environmental　sectors.