A　Pd-loaded　composite　electrode　was　prepared　by　electrodeposition　method,　modified　by　a　sodium　dodecyl　benzene　sulfonate　(SDBS)　doping　polypyrrole　(PPy)　film.　Pd　particles　were　uniformly　dispersed　on　a　PPy-SDBS　film　which　was　previously　electrodeposited　on　the　meshed　Ti　supporting　electrode.　Preparation　parameters　of　the　Pd/PPy-SDBS/Ti　electrode　were　optimized,　i.e.　SDBS　concentration　of　1.00　g/L,　Pd　electrodepositing　current　of　20　mA,　and　time　of　30　min.　The　prepared　Pd/PPy-SDBS/Ti　electrode　was　characterized　by　scanning　electron　microscopy　(SEM),　cyclic　voltammetry　(CV)　and　inductively　coupled　plasma-atomic　emission　spectrometry　(ICP-AES).　Electrocatalytic　dechlorination　of　2,4-DCP　in　aqueous　solution　was　performed　in　a　two-compartment　cell　separated　by　cation-exchange　membrane.　The　conversion　efficiency　of　2,4-DCP　could　be　up　to　96.7%　within　90　min　with　current　of　5　mA　when　initial　concentration　was　100　mg/L.　The　Pd/PPy-SDBS/Ti　electrode　shows　high　catalytic　activity　and　low　cost,　presenting　a　good　application　prospect　in　dechlorination　of　chlorinated　organic　compounds.