Chlorophenols　are　persistent　organic　pollutants　with　high　toxicity.　Dichlorophenols　(DCPs)　include　six　isomers　due　to　different　substituted　position　of　chlorine　atoms.　Self-made　Pd/polypyrrole　(sodium　dodecylbenzene　sulfonate)/Ti　electrode　(Pd/PPy(SDBS)/Ti　electrode)　was　employed　to　dechlorinate　six　DCP　isomers.　The　effects　of　electrolysis　current,　initial　pH　and　the　initial　concentration　of　target　pollutant　on　the　dechlorination　process　of　2,　5-DCP　were　investigated.　Under　the　selected　conditions,　i.e.,　applied　current　of　5　mA,　initial　pH　of　2.5　and　temperature　of　25,　dechlorination　experiments　of　2,　3-DCP,　2,　5-DCP,　2,　4-DCP,　2,　6-DCP,　3,　4-DCP　and　3,　5-DCP　with　the　same　DCP　concentration　of　100　mgL-1　were　conducted,　respectively.　Phenol　was　the　main　product　and　a　small　amount　of　monochlorophenol　could　be　detected　during　the　dechlorination　of　six　DCPs.　The　reaction　rate　constants　of　six　DCPs　were　4.73510-2　min-1,　4.60910-2　min-1,　4.84510-2　min-1,　4.31710-2　min-1,　3.97310-2　min-1　and　3.77010-2　min-1,　respectively.　It　showed　that　the　degradation　rates　of　DCPs　were　affected　by　pKa,　protonation　and　pH.　The　degradation　difficulty　of　six　DCPs　was　2,　4-DCP　©　All　Right　Reserved.