At　present,　wireless　power　transfer　systems　based　on　magnetic　resonance,　parity-time　symmetry,　and　fractional　order　have　received　more　and　more　attention,　especially　in　wireless　charging　applications　of　mobile　phones,　electric　vehicles,　and　other　products.　However,　the　consequent　electromagnetic　radiation　safety　issues　are　becoming　increasingly　prominent.　Therefore,　this　paper　compares　and　studies　the　magnetic　field　distribution　of　magnetic　resonance,　parity-time　symmetric　and　fractional-order　wireless　power　transfer　systems,　and　uses　ANSYS　simulation　software　to　simulate　and　comparative　analyze.　The　simulation　results　show　that　under　the　condition　of　equal　output　power,　the　magnetic　field　distribution　of　the　parity-time　symmetric　wireless　power　transfer　system　is　more　concentrated　when　the　coupling　coefficient　is　small,　while　the　magnetic　field　distribution　of　the　magnetic　resonance　wireless　power　transfer　system　is　more　concentrated　when　the　coupling　coefficient　is　large,　but　it　is　significantly　smaller　than　that　of　the　fractional-order　wireless　power　transfer　system.　In　addition,　the　safety　range　of　the　parity-time　symmetric　wireless　power　transfer　system　is　significantly　larger　than　that　of　the　magnetic　resonance　and　the　fractional-order　wireless　power　transfer　system　at　different　output　power.　Remarkably,　the　magnetic　field　distribution　of　fractional-order　wireless　power　transfer　system　will　also　change　with　different　order,　which　implies　that　the　safety　range　of　the　fractional-order　wireless　power　transfer　system　can　be　designed　according　to　the　requirements　to　achieve　the　ideal　safety　range.　©　2024　IEEE.