The　conventional　electrical　measurement　methods　to　obtain　the　core　losses　by　testing　the　absolute　power,　and　have　their　inherent　drawbacks.　A　novel　method　for　high-frequency　magnetics　core　losses　test　based　on　testing　the　input　power　variation　of　the　test　circuit　was　proposed.　The　corresponding　test　device　was　built　with　a　DC/AC　inverter　circuit　as　the　exciting　source　of　the　DUT,　as　well　the　test　circuit.　By　the　DSP　digital　control　and　computer　software,　an　automatic　test　prototype　was　built　based　on　the　differential　method.　Finally,　the　calorimetric　method　was　also　built　to　validate　the　feasibility　and　accuracy　of　the　proposed　method　and　the　test　prototype.　©　2017　Chin.　Soc.　for　Elec.　Eng.