In　this　work,　polytetrafluoroethylene　coating　was　firstly　conducted　to　make　stable　and　effective　magnetic-activated　carbon　as　a　heterogeneous　electro-Fenton　catalyst　for　diuron　oxidation.　The　catalysts　were　characterized　by　scanning　electron　microscopy　(SEM),　X-ray　photoelectron　spectroscopy　(XPS)　and　X-ray　diffraction　(XRD).　In　addition,　the　effects　of　operating　parameters　such　as　catalyst　dosage,　current　intensity,　substrate　concentration　and　pH　on　the　degradation　of　diuron　were　investigated.　The　removal　efficiency　of　diuron　was　more　than　95%　within　120　min　oxidation　under　the　conditions　of　I　=　100　mA,　pH　=　6.7　+/-　0.2,　catalyst　loading　3　g　L-1　and　diuron　concentration　10　mg　L-1.　Moreover,　the　catalyst　durability　test　demonstrated　that　the　modification　of　5%　PTFE　on　the　catalyst　indeed　has　a　significant　beneficial　effect　on　the　useful　life　of　the　catalyst.　We　compared　the　performance　of　catalysts　with　or　without　PTFE　modification　in　consecutive　experiments;　the　modified　catalysts　exhibited　remarkable　advantages　in　that　the　diuron　removal　efficiency　was　stable　with　relatively　low　iron　leaching　(＜0.1　mg　L-1)　during　ten　consecutive　degradation　experiments,　which　proved　the　durability　and　reusability　of　the　modified　catalyst.　This　work　demonstrates　that　such　a　heterogeneous　EF　using　stable　magnetic　activated　carbon　catalyst　with　PTFE　modification　is　promising　for　organic　wastewater　treatment　in　initial　neutral　pH　conditions;　at　the　same　time,　these　good　properties　of　the　modified　catalyst　increase　the　possibility　of　practical　application.