It　was　the　first　time　that　humic　acid　(HA)　was　used　to　non-covalent　functionalize　multi-walled　carbon　nanotubes　(MWCNTs).　The　MWCNT　and　HA-MWCNT　was　characterized　by　X-ray　photoelectron　spectroscopy　(XPS),　infrared　spectra　(IR)　and　transmission　electron　microscopy　(TEM).　Then,　a　HA　non-covalent　functionalized　multi　walled　carbon　nanotubes　(HA-MWCNTs)　membrane　was　prepared　by　vacuum　filtration　and　used　to　remove　organic　dyes.　To　investigate　the　removal　mechanism　of　organic　dyes　by　HA-MWCNTs　membrane,　the　dynamic　filtration　effectiveness　of　HA-MWCNTs　membrane　was　compared　with　the　adsorption　ability　of　HA-MWCNTs.　The　results　proved　that　HA-MWCNTs　membrane　had　a　higher　effectiveness　for　the　removal　of　dyes　as　it　had　shorter　filtration　time　compared　with　the　static　adsorption　experiment.　Especially,　the　HA-MWCNTs　membrane　had　a　higher　removal　efficiency　for　cationic　dye　methylene　blue　(MB)　than　the　raw　MWCNTs　(P-MWCNTs)　membrane.　The　electrostatic　interaction　played　an　important　role　on　the　removal　of　MB,　and　the　functionalization　of　MWCNTs　with　HA　increased　the　surface　electronegativity　of　MWCNTs　membrane,　and　promoted　the　removal　of　MB　during　filtration　process.　As　for　RB19,　in　addition　to　7C-7C　stacking　interaction,　electrostatic　interaction　also　influenced　its　removal　by　MWCNTs　membrane.　Compared　with　P-MWCNTs　membrane,　HAMWCNTs　membrane　slightly　decreased　the　effectiveness　of　RB19　removal　during　filtration　due　to　the　increased　electrostatic　repulsion.　Generally,　the　dynamic　membrane　filtration　based　on　MWCNTs　composite　membrane　could　avoid　the　ecological　risk　caused　by　the　release　of　MWCNTs.　It　provided　a　new　idea　for　the　further　innovation　of　low-pressure　membrane　technology　in　the　field　of　dye　wastewater　treatment.