In　order　to　further　study　the　influence　of　factors　on　the　braking　torque　of　liquid-cooled　eddy　current　retarder　(ECR)　with　dual　salient　poles,　this　paper　applies　electromagnetic　theory　to　deduce　the　braking　power　and　calculation　formulas　of　braking　torque　considering　the　structural　features　of　ECR　with　dual　salient　poles　and　also　analyses　the　factors　affecting　the　braking　torque.　On　the　basis　of　all　above,　this　paper　also　makes　detailed　analyses　about　the　influence　of　different　stator　materials　and　different　thickness　of　plating　layer　on　the　braking　torque.　A　3-D　model　of　ECR　is　built　and　JMAG　software　is　used　to　carry　out　simulation　analysis　on　the　3-D　model.　At　last,　the　correctness　of　theoretical　derivation　and　simulation　analysis　can　be　verified　through　prototype　test,　which　provides　a　good　theoretical　guidance　for　the　further　optimization　of　ECR.　©　2015　Engineers　Australia.