Planar　spiral　coil　is　widely　used　in　the　field　of　WPT　because　of　their　simple　structure.　Based　on　high　frequency　eddy　current　loss　mechanism,　the　influence　of　the　Proximity　effect　on　the　AC　resistance　of　winding　is　analyzed.　It　reveals　the　total　loss　of　coil　can　be　reduced　by　layering　the　coil　to　reduce　proximity　effect　when　the　ratio　of　loss　due　to　proximity　effect　is　large　and　based　on　which　layered　staggered　winding　structure　and　double　laminated　winding　structure　are　proposed.　This　method　can　reduce　the　AC　resistance　and　improve　the　quality　factor　Q　at　high　frequency.　Through　simulation,　the　AC　loss　of　coils　based　on　layered　staggered　winding　structure　and　double　laminated　winding　structure　can　be　greatly　reduced　comparing　to　the　traditional　coil　structure,　which　verifies　the　theory　analysis　to　be　correct　and　flexible.　©　2021　IEEE.