In　this　work,　a　Ni　foam/CNTs/Cu　composite　electrode　was　prepared　via　the　impregnation　and　electrodeposition　methods.　The　electrode　enhanced　the　total　nitrogen　removal　and　N2　selectivity,　when　served　as　a　cathode　for　NO3-　-N　reduction.　SEM,　EDS,　XRD,　and　XPS　characterization　revealed　that　both　CNTs　and　metallic　copper　were　introduced　onto　the　surface　of　the　Ni　foam　substrate　successfully.　Besides,　the　LSV,　CV,　EIS　and　Cdl　results　indicated　more　electrochemical　active　sites　were　in　the　Ni　foam/CNTs/Cu　electrodes　than　in　Ni　foam/Cu　electrodes.　Under　optimal　preparation　conditions,　the　Ni　foam/CNTs/Cu　electrode　showed　N2　selectivity　of　68.89　%　and　nitrate　removal　rate　of　96.75　%　in　100　mg/L　nitrate　solution　with　Na2SO4　as　electrolyte.　The　selectivity　of　N2　could　be　significantly　enhanced　by　adding　Cl-　as　electrolyte,　and　the　nitrogen　selectivity　increased　with　the　increase　of　Cl-　concentration.　At　1.25　g/L　NaCl,　the　Ni　foam/CNTs/Cu　electrode　could　achieve　＞95　%　nitrate　and　total　nitrogen　removal　and　close　to　100　%　N2　selectivity.　The　N2　selectivity　of　the　Ni　foam/CNTs/Cu　electrode　was　2.534　and　1.8　times　of　the　Ni　foam/Cu　electrode　when　0.5　g/L　Na2SO4　and　0.5　g/L　NaCl　were　used　as　electrolytes,　respectively.　Consequently,　to　achieve　the　same　nitrate　reduction　effect,　the　Ni　foam/CNTs/Cu　electrode　could　reduce　the　amount　of　NaCl　compared　with　Ni　foam/Cu　electrode.　The　electrodes　were　tested　in　6　cycles　and　proved　to　be　stable.　At　last,　a　potential　mechanism　of　nitrate-nitrogen　removal　by　the　electrocatalytic　process　was　suggested.