院　In　the　traditional　Ti/茁-PbO2　electrode,　the　crystal　lattice　difference　between　茁-PbO2　and　Ti　matrix　is　large,　and　the　prepared　electrode　is　easy　to　fall　off　and　has　a　short　service　life.　It　needs　to　be　modified　in　actual　use.　Based　on　the　advantages　of　琢-PbO2　material　and　Ag　material　in　terms　of　adhesion　and　conductivity,　respectively,　the　above　two　materials　are　selected　as　the　intermediate　layer　of　Ti/茁-PbO2　electrode　to　improve　electrode　performance.　In　this　paper,　by　preparing　Ti/琢/茁-PbO2　and　Ti/Ag/茁-PbO2　electrodes　with　different　intermediate　layers,　the　superiority　and　feasibility　of　electrocatalytic　oxidation　technology　for　rapid　determination　of　organic　matter　(COD)　content　in　simulated　glucose　wastewater　were　investigated.　Firstly,　the　properties　of　the　two　electrodes　were　evaluated　by　scanning　electron　microscopy　(SEM)　and　X-ray　diffraction　(XRD)　to　characterize　the　surface　morphology　and　crystal　structure　of　the　electrodes,　respectively.　The　electrode　surfaces　of　Ti/琢/茁-PbO2　and　Ti/Ag/茁-PbO2　had　no　other　granular　crystal　bare　leakage,　and　their　crystal　arrangement　was　relatively　compact.　Compared　with　Ti/Ag/茁-PbO2,　the　crystal　structure　of　Ti/琢/茁-PbO2　electrode　surface　was　more　uniform　and　the　grain　size　was　smaller.　Secondly,　a　series　of　electrochemical　performance　tests　were　carried　out　on　the　two　electrodes　by　employing　linear　scanning　voltammetry　(LSV),　Tafel　curve　analysis,　cyclic　voltammetry　(CV)　and　AC　impedance　spectroscopy.　The　results　show　that　the　crystal　structure　of　Ti/琢/茁-PbO2　electrode　surface　was　more　uniform,　and　the　grain　size　was　smaller,　and　the　electroactive　surface　area　was　larger.　The　oxygen　evolution　potential　of　Ti/琢/茁-PbO2　electrode　was　1.77　V,　which　provides　a　good　condition　for　the　formation　of窑OH.　In　Tafel　and　CV　tests,　the　exchange　current　density　i0　and　the　specific　capacitance　CP　of　Ti/琢/茁-PbO2　electrode　were　0.0995　A窑cm-1　and　0.004098　F窑cm-1,　respectively,　which　are　higher　than　those　of　Ti/Ag/茁-PbO2　electrode,　indicating　that　Ti/琢/茁-PbO2　electrode　has　excellent　corrosion　resistance　and　electron　releasing　ability,　Finally,　the　Ti/琢/茁-PbO2　electrode　was　selected　as　a　working　electrode.　The　results　show　that　the　optimum　conditions　for　the　determination　of　COD　by　Ti/琢/茁-PbO2　electrode　were　as　follows:　the　oxidation　potential　1.30　V,　electrolysis　time　150　s,　electrolyte　concentration　0.03　mol窑L-1　sodium　nitrate　(NaNO3).　The　correlation　coefficient　of　COD　measured　by　electrochemical　method　and　colorimetric　digestion　method　reached　0.9909,　and　it　had　good　reproductivity　and　correlation.　The　detection　range　of　COD　was　0　mg窑L-1　~　500　mg窑L-1,　which　can　replace　the　standard　potassium　dichromate　method　within　the　error　allowable　range,　and　provide　reference　value　for　the　realization　of　rapid　online　COD　detection.　In　follow-up　studies,　actual　water　samples　such　as　surface　water　or　sewage　plant　effluent　will　be　compared　with　the　colorimetric　digestion　method,　and　attention　will　be　paid　to　the　sensitivity　of　the　electrode　after　multiple　cycles　of　use.　©　2021　Authors.　All　rights　reserved.