Thin　film　nanocomposite　(TFN)　membrane,　which　consists　of　nanofiller　embedded　polyamide　layer　and　a　porous　substrate,　have　been　deemed　as　a　promising　candidate　to　achieve　multifunctionality,　property　enhancement　and　controllable　separation　process.　Being　different　from　traditional　interfacial　polymerization　synthesis　process,　this　work　attempts　to　use　MXene　nanosheets　as　nanofillers　on　membranes　surface　while　polyamide　constructed　by　interfacial　polymerization　is　served　as　intercalate　reagent　and　stabilizer.　The　positively　charged　polyethyleneimine　(PEI)　and　negatively　charged　MXene　nanosheets　guaranteed　a　favorable　compatibility,　which　finally　endowed　the　obtained　membranes　with　high　rejection　toward　different　dyes.　The　optimal　membrane　decorated　by　0.1　mg　PEI　and　0.15　mg　MXene　possesses　a　pure　water　permeability　of　20.9　LMH　bar−1　and　dyes　rejection　of　99.42%,　99.02%　and　98.84%　for　Congo　red,　Reactive　blue　19　and　Methyl　blue,　respectively.　Meantime,　the　membrane　exhibited　impressive　rejections　towards　Na2SO4　and　NaCl　(65.7%　and　23.9%).　The　enhanced　performance　of　the　MXene-based　membrane　is　mainly　due　to　the　amplified　interlayer　distance　and　the　appropriate　crosslinking　degree,　which　increases　the　water　transport　and　retain　the　rejection　simultaneously.　Overall,　this　work　suggests　that　the　employment　of　MXene　nanosheets　for　the　construction　of　high-performance　nanofiltration　membranes　can　be　a　successful　choice　to　treat　dye　wastewater.　©　2021