Iron-nitrogen　co-doped　modified　corncob　(Fe-N-BC)　was　synthesized　using　a　hydrothermal　and　calcination　method.　The　material　shows　excellent　oxidation　performance　and　environmental　friendliness.　When　the　dosage　of　Fe-N-BC　was　0.6　g　L-1,　the　concentration　of　H2O2　was　12　mM　and　pH　was　4,　ciprofloxacin　(CIP)　was　virtually　totally　eliminated　in　240　min　under　Fe-N-BC/H2O2　conditions.　The　TOC　removal　efficiency　was　54.6%,　and　the　effects　of　various　reaction　parameters　on　the　catalytic　activity　of　Fe-N-BC　were　thoroughly　assessed.　Through　electron　paramagnetic　resonance　(EPR)　analyses　and　free　radical　quenching　experiments,　it　was　established　that　the　reactive　oxygen　species　(OH,　O2-,　1O2)　were　crucial　in　the　elimination　of　CIP.　Furthermore,　the　degradation　of　CIP　was　accelerated　by　the　synergistic　interaction　between　the　transition　metal　and　PFRs.　A　thorough　evaluation　was　conducted　to　assess　the　respective　contributions　of　adsorption　and　catalytic　oxidation　in　the　system.　The　degradation　mechanism　of　CIP　was　proposed　under　Fe-N-BC/H2O2　conditions.　Meanwhile,　the　possible　degradation　intermediates　and　pathways　were　proposed,　and　the　toxicity　of　the　degradation　products　of　CIP　was　also　meticulously　investigated　in　the　study.　These　findings　offered　the　elimination　of　CIP　in　water　a　theoretical　foundation　and　technical　support.　OH,　O2-　and　1O2　were　the　key　reactive　species　in　the　Fe-N-BC/H2O2　system.　The　degradation　mechanism,　possible　pathways　and　products　toxicity　of　CIP　were　proposed.