A　composite　Pd　coated　electrode　was　prepared,　which　was　modified　with　polypyrrole　(PPy)　and　multiwall　carbon　nanotubes　(MWCNTs),　named　Pd/PPy-MWCNTs/Ti　electrode.　The　preparation　parameters　of　Pd/PPy-MWCNTs/Ti　were　discussed.　The　content　of　MWCNTs　adsorbed　on　Ti　substrate　was　1.0　mg,　the　polymerization　current　of　pyrrole　was　5　mA　for　4　min　and　the　depositing　current　of　Pd　was　40　mA　for　45　min.　The　prepared　electrode　was　characterized　by　scanning　electron　microscopy　(SEM)　and　X-ray　diffraction　(XRD).　It　was　used　for　pentachlorophenol　(PCP)　dechlorination　in　aqueous　solution.　PCP　with　initial　concentration　of　10　mg/L　was　completely　removed　by　Pd/PPy-MWCNTs/Ti　electrode　in　90　min　under　the　conditions　of　the　electrolysis　current　of　5　mA　and　the　initial　pH　of　2.2　at　ambient　temperature.　The　removal　of　PCP　was　maintained　at　100%　when　Pd/PPy-MWCNTs/Ti　electrode　was　reused　eight　times.　It　revealed　that　the　self-made　electrode　had　good　stability　for　electrochemical　dechlorination.