The　analysis　of　charge　circuit　and　discharge　circuit　is　a　key　part　in　the　theoretical　study　of　electromagnetic　riveting　electromagnetic　field.　Numerical　simulation　was　used　to　establish　the　charge　circuit　model　and　the　discharge　circuit　model　which　was　an　electric　circuit-magnetic　circuit　coupling　process　by　ANSYS.　The　simulation　of　charge　circuit　shows　that　the　development　of　the　charge　current　over　time　is　an　exponential　descending　change　and　that　of　the　charge　voltage　over　time　is　an　exponential　ascending　change.　And,　the　simulation　of　discharge　circuit　indicates　that　the　driver　is　mainly　subjected　to　axial　magnetic　force,　whose　distribution　is　non-uniform　along　the　radial　direction　of　driver,　and　the　maximum　value　of　axial　magnetic　force　locates　in　about　half　of　the　driver　radius.