Separating　anionic　surfactant-stabilized　oil-in-water　emulsions　remains　a　critical　challenge　due　to　the　presence　of　surfactants.　In　this　study,　we　developed　a　unique　collagen　fiber-based　CFM-PEI-TiO2　with　superhydrophilic　and　underwater　superoleophobic　properties,　enabling　efficient　separation　of　various　anionic　surfactant-stabilized　oilin-water　microemulsions　and　nanoemulsions　through　charge　demulsification　effects.　The　membrane　achieved　high　separation　flux　(1458.50　L　&　sdot;m-　2　&　sdot;h-　1)　and　separation　efficiency　(99.94%)　simultaneously.　Importantly,　the　membrane　exhibited　remarkable　mechanical　durability,　as　it　remained　capable　of　separating　diverse　oil-in-water　emulsions　even　after　being　subjected　to　abrasion　with　sandpaper　for　500　cycles,　highlighting　its　long-term　durability　and　economic　viability.　The　robust　membrane　also　demonstrated　excellent　recyclability,　with　a　separation　efficiency　of　over　99%　after　twelve　cycles　and　a　flux　of　1299.10　L　&　sdot;m-　2　&　sdot;h-　1　after　fifteen　cycles.　These　properties　can　be　attributed　to　the　PEI-induced　electrostatic　interactions　and　the　enhanced　superhydrophilicsuperoleophobic　interaction　provided　by　TiO2　on　the　unique　collagen　fiber　membrane.　The　outcomes　emphasize　the　versatility　and　potential　of　our　membrane　in　overcoming　the　challenges　associated　with　emulsified　oily　wastewater.