The　electrocatalytic　conversion　of　nitrate　(NO3-)　into　ammonia　(NH3)　is　an　eco-friendly　alternative　approach　that　integrates　eliminating　the　NO3-pollutants　from　water　with　the　production　of　valueadded　NH3.　However,　traditional　working　electrodes　for　the　electrocatalytic　NO3-reduction　reaction　(NO3RR)　are　primarily　fabricated　using　binder-mediated　techniques,　which　often　result　in　low　current　densities　due　to　the　restricted　electronic　transport　from　the　external　voltage　to　the　active　sites.　Herein,　we　develop　a　self-supporting　electrode　technique　based　on　copper-based　metal-organic　framework　(MOF)　glasses　for　efficient　electrocatalytic　NO3RR　towards　NH3.　The　preparation　of　the　copper-based　MOF　glass　self-supporting　electrode,　denoted　as　agCu(MeIm)2-CC　(where　＂a＂,　＂g＂,　HMeIm　and　CC　represent　amorphous,　glass,　2-methylimidazole,　and　carbon　cloth,　respectively)　involves　the　ball-milling　of　crystalline　Cu(MeIm)2　onto　the　CC,　followed　by　melt-annealing　for　in-situ　growth　of　agCu(MeIm)2　on　the　surface　of　the　CC.　Thanks　to　the　intrinsic　binding　property　of　MOF　glasses,　the　agCu(MeIm)2-CC　containing　free　nonconductive　binder　(e.g.,　Nafion)　exhibits　an　exceptionally　high　NH3　partial　current　density　(jNH3)　of-1207　mA　cm-2　at　constant　current　electrolysis　measurements.　Compared　to　crystalline　Cu(MeIm)2,　the　MOF　glass-derived　Cu　nanoparticles　retain　a　lower　coordination　number　(2.3　versus　6.3)　after　electrocatalytic　reconstruction,　which　enhances　NO3RR　activity　by　optimizing　NO3-adsorption.　As　a　result,　it　achieves　a　high　Faradaic　efficiency　for　NH3　of　91%　at-1.8　V　(vs　Ag/AgCl).　This　work　represents　a　new　exploration　aimed　at　advancing　the　industrialization　of　the　electrocatalytic　reduction　of　NO3-to　NH3　through　the　development　of　self-supporting　electrodes,　thereby　highlighting　the　potential　of　MOF　glasses　in　electrocatalysis.