Polyaniline　nanorods　doped　with　sulfosalicylic　acid　were　prepared　by　chemical　oxidization　polymerization　with　aniline　as　monomer　and　ammonium　persulfate　as　oxidant.　The　influence　of　mono　mer/dopant　mole　ratio　on　the　electrochemical　properties　and　morphology　of　synthesized　polyaniline.　The　structure　of　polyaniline　was　characterized　and　studied　by　FT-IR　spectrometric　and　XRD　analysis.　Four-point　and　electrochemical　system　analysis　show　that　conductivity　of　polianiline　nanorod　increase　as　the　increasement　of　dopant/monomer　mole　ratio　and　it　reached　to　1.43　S/cm　as　the　dopant/monomer　mole　ratio　is　0.5.　SEM　and　TEM　images　indicate　that　typical　nanorods　are　rough　with　diameter　of　about　100-200　nm　and　length　of　about　400-700　nm,　respectively.　Small　10-30　nm　granular　nanoparticles　appear　to　agglomerate　onto　the　available　nanorod　surface.　At　last,　the　probable　formation　mechanism　of　polyaniline　nanorod　is　proposed.