The　existing　technologies　of　wireless　power　transfer　are　proposed　and　constructed　based　on　the　theory　of　integer-order　system.　However,　the　transfer　characteristics　are　sensitive　to　the　transfer　distance　and　the　change　of　system　parameters,　and　the　anti-interference　ability　is　weak,　so　it　is　difficult　to　adapt　to　actual　application　demands.　Therefore,　exploring　new　mechanisms　and　technologies　of　wireless　power　transfer　is　a　long-term　research　topic.　Benefiting　from　the　rapid　development　of　fractional-order　calculus,　the　mechanism　and　technology　of　fractional-order　wireless　power　transfer　have　been　proposed.　Different　from　the　traditional　integer-order　system,　the　fractional-order　wireless　power　transfer　system　is　based　on　its　unique　memory　characteristics,　negative　resistance　characteristics,　and　frequency　characteristics　to　achieve　the　medium-distance　wireless　power　transfer　with　high　efficiency　and　high　anti-interference.　The　proposed　system　with　flexible　design　can　be　adapted　to　the　demands　of　various　occasions.　To　this　end,　this　paper　introduces　the　proposal　process　and　research　progress　of　the　fractional-order　wireless　power　transfer　mechanism,　which　are　expounded　from　the　aspects　of　fractional-order　calculus,　fractional-order　components　and　circuits,　and　fractional-order　wireless　power　transfer　mechanism.　Finally,　the　proposed　system　is　compared　with　the　existing　integer-order　wireless　power　transmission　system.　The　results　show　that　the　transmission　efficiency　and　output　power　of　the　proposed　system　are　insensitive　to　the　changes　of　distance　and　resonance　frequency.　©　2022　Automation　of　Electric　Power　Systems　Press.