Omnidirectional　wireless　power　transfer　technology　is　widely　concerned　by　domestic　and　foreign　research　institutions　and　research　institutes　due　to　its　unique　advantages　such　as　good　location　robustness,　high　safety　and　reliability,　and　strong　environmental　affinity.　Firstly,　the　application　field　of　omnidirectional　wireless　power　transfer　technology　and　the　domestic　and　foreign　development　are　described.　Then,　key　fundamental　problems　of　the　electromagnetic　coupling　system　are　analyzed　in　detail,　including　the　design　and　optimization　of　electromagnetic　coupling　structure,　magnetic　field　direction　control　strategy　and　electromagnetic　compatibility.　Finally,　key　problems　and　technical　difficulties　in　engineering,　productization　and　commercialization　of　the　technology　are　discussed,　and　its　application　prospect　is　further　prospected.　©　2020　Automation　of　Electric　Power　Systems　Press.