In　a　magnetic　coupled　wireless　power　transfer　(WPT)　system,　reflected　impedance　is　the　equivalent　impedance　reflected　from　receiver　to　transmitter,　playing　an　important　role　in　transfer　efficiency.　However,　the　study　on　the　reflected　impedance　of　fractional-order　magnetic　coupled　WPT　systems　is　lacking.　Therefore,　this　paper　analyzes　the　reflected　impedance　characteristics　of　fractional-order　WPT　systems.　Based　on　circuit　theory,　comparative　investigations　about　the　reflected　impedance　of　fractional-order　and　integer-order　WPT　systems　are　performed.　It　is　demonstrated　that　the　reflected　impedance　of　the　fractional-order　WPT　system　has　a　stronger　anti-interference　ability　against　the　shift　of　coupling　coefficient　and　resonant　frequency　than　the　integer-order　WPT　system.　The　experimental　results　verify　the　correctness　of　the　theoretical　analysis.