Core　losses　are　critical　for　magnetic　component　analysis　and　optimal　design.　The　problems　with　traditional　AC　meter　test　method　of　core　losses　are　deeply　analyzed　and　the　rood　cause　of　its　poor　accuracy　is　revealed　for　higher　frequency　operation　and　for　powder　cores.　Some　notices　are　proposed　to　reduce　the　errors　for　AC　power　meter　method.　And　then　a　novel　method,　named　as　DC　power　meter　method,　is　presented,　which　overcomes　the　error　problems　caused　by　large　impedance　angle　of　the　DUT　with　AC　meter　method.　A　calibration　method　for　DC　power　meter　method　is　also　presented　to　ensure　the　core　loss　accuracy.　The　novel　method　is　more　suitable　for　the　core　loss　test　of　powder　core　and　under　practical　PWM　excitations.