High-performance　permanent　magnet　motors　can　operate　reliably　at　temperatures　of　100　oC　or　more.　In　hightemperature　environments,　the　temperature　has　a　great　impact　on　the　performance　of　materials　such　as　permanent　magnets,　cores,　and　windings.　However,　according　to　the　test　standard,　the　magnetic　properties　of　magnetic　materials　are　usually　measured　at　room　temperature,　ignoring　the　effect　of　temperature.　To　accurately　design　magnetic　devices　that　are　used　at　high　temperatures,　it　is　necessary　to　understand　the　behavior　of　several　magnetic　materials　at　high　temperatures.　The　purpose　of　this　paper　is　to　analyze　and　study　the　effect　of　temperature　on　the　characteristics　and　performance　of　highspeed　permanent　magnet　motor　in　high-temperature　environments.　©　2020　IEEE.