Electrocatalytic　CO2　reduction　to　syngas　is　a　promising　method　for　solving　the　problem　of　CO2　pollution.　In　this　work，Ag+　was　introduced　during　the　synthesis　of　cobalt-based　metal-organic　frameworks　ZIF-67　used　as　precursors，and　a　series　of　CoAg　co-loaded　nitrogen-carbon　materials　（CoAg　（a：b）　-N-C）　were　synthesized　by　adjusting　the　Co/Ag　molar　ratio　and　calcination　temperature.　X-ray　diffraction　（XRD）　and　X-ray　photoelectron　spectroscopy　（XPS）　characterizations　indicated　that　the　Co　and　Ag　nanoparticles　were　mainly　loaded　on　the　carbon　matrix　in　the　form　of　elementary　substances，and　some　metal　element　existed　by　forming　chemical　bonds　between　transition　metal　and　N　elements　（M-N）.　Transmission　electron　microscopy　（TEM）　further　verified　that　some　metal　nanoparticles　were　wrapped　by　the　carbon　material，thereby　effectively　preventing　the　metal　nanoparticles　from　agglomerating　during　use.　Linear　sweep　voltammetry　（LSV）　tests　indicated　that　CoAg　（a：b）　-N-C　exhibited　higher　electrocatalytic　CO2　reduction　activity　than　Co-N-C.　The　Faraday　efficiencies　（FE）　of　CO　and　H2　for　CoAg　（1∶1）　-N-C-900　at　-0.53　V　（vs.RHE）　were　45%　and　26%，respectively，and　the　CO/H2　ratio　was　1.73.　The　FE　indicated　that　the　Co/Ag　molar　ratio，calcination　temperature　and　reduction　potential　could　affect　the　CO/H2　ratio　and　the　CO/H2　ratio　was　0.43~1.73　by　adjusting　the　Co/Ag　ratio.　The　mechanism　analysis　revealed　that　the　introduction　of　Ag　facilitated　the　electron　transport　and　improved　the　adsorption　ability　towards　CO2　and　intermediate　CO*，ultimately　improving　the　electrocatalytic　reduction　activity　of　CoAg　（1∶1）　-N-C-900　towards　CO2.　This　work　indicates　that　CoAg　（a：b）　-N-C　is　a　promising　material　for　electrocatalytic　CO2　reduction　into　syngas.　©　2023　Science　Press.　All　rights　reserved.