Electrochemical　reductive　degradation　of　diclofenac　in　aqueous　solution　was　studied　using　a　palladium-loaded　multi-walled　carbon　nanotubes　(Pd/MWCNTs)　electrode.　The　Pd/MWCNTs　electrode　was　characterized　using　scanning　electronic　microscopy,　X-ray　diffraction,　and　cyclic　voltammetry　(CV).　The　Pd/MWCNTs　electrode　was　used　as　the　cathode　and　a　platinum　wire　was　used　as　the　anode　for　the　CV　experiment.　The　various　electrolysis　parameters　that　affect　the　degradation　of　diclofenac,　including　feed　concentration,　applied　voltage,　pH,　supporting　electrolyte　concentration,　and　electrolysis　time　were　investigated.　The　Pd/MWCNTs　electrode　demonstrated　the　best　performance　compared　with　that　of　the　graphite　and　MWCNTs　electrodes　and　achieved　a　removal　efficiency　of　90.6%　after　2　h.　The　electrochemical　reduction　degradation　followed　pseudo-first-order　kinetics.　Finally,　two　possible　degradation　pathways　were　proposed　based　on　the　degradation　products　identified　using　high　performance　liquid　chromatography-mass　spectrometry　(HPLC-MS).