Aiming　at　the　problems　of　large　power　consumption,　serious　heat-fade　and　failure　to　recover　braking　energy　of　the　conventional　eddy　current　retarder,　a　new　electromagnetic　liquid-cooled　energy　recovery　retarder　was　proposed　based　on　the　principle　of　eddy　current　brake　and　regenerative　brake.　The　new　retarder　is　composed　of　a　liquid　cooled　eddy　current　retarder　and　a　single-phase　reluctance　motor.　The　electromagnetic　field　model　of　the　new　retarder　was　established　by　fmite　element　method,　the　eddy　current　braking　performance　of　the　new　retarder　was　predicted,　the　opening　and　closing　angles　of　the　reluctance　motor　were　optimized,　and　energy　recovery　power　was　calculated　during　downhill　continuous　braking.　The　simulation　results　showed　that　the　eddy　current　braking　torque　reached　1560N.m　at　1500r/min,　and　the　energy　recovery　power　reached　about　30　kW　when　the　vehicle　was　slowed　down　at　speed　of　35Km/h.