In　this　paper,　numerical　simulation　and　finite　element　analysis　were　applied　to　optimize　the　important　parameters　including　V-type　joint　and　current　frequency　for　high-frequency　induction　welding.　The　coupling　of　the　3D　harmonic　electromagnetic　field　and　3D　transient　temperature　field　was　analyzed　by　establishing　the　physical　file　of　the　electromagnetic　field　and　temperature　field　in　high-frequency　induction　welding.　The　influence　of　important　welding　parameters　on　the　temperature　field　distribution　in　the　welding　area　was　obtained　by　using　a　single　control　variable　method.　In　the　temperature　field,　the　size　of　the　V-type　joint　determines　the　heating　efficiency,　and　the　current　frequency　affects　the　heat　produced　by　the　eddy　current.　The　numerical　simulation　results　were　verified　by　the　analysis　of　the　actual　production　experimental　results　and　a　good　process　parameter　group　was　summarized.　The　shape　of　the　slit　between　the　different　V-type　joint　parameters　and　the　centerline　of　the　squeeze　roll　showed　that　the　relationship　of　the　welding　image　and　the　welding　quality　and　provided　a　solution　for　real-time　online　monitoring　of　welding　quality.　©　2020