Cemented　carbide　is　a　composite　material　consisting　of　a　hard　phase,　which　is　tungsten　carbide,　and　a　binder　phase　of　Co,　whose　content　influences　the　dissolution　process　of　cemented　carbide.　Finite　element　simulations　of　Co　dissolution　during　the　electrolysis　of　the　molten　salt　of　cemented　carbide　were　conducted　for　different　Co　contents　using　the　numerical　simulation　software　COMSOL　Multiphysics.　According　to　the　changes　in　the　mass　of　dissolved　anode　material　and　in　the　Co2+　concentration　in　the　molten　salt　at　various　times,　the　time　of　complete　Co　dissolution　increases　in　cemented　carbide　with　low　Co　content　because　the　discontinuity　of　the　Co　phase　leads　to　secondary　dissolution　of　Co　in　the　dissolution　process;　with　the　increase　in　Co　content,　the　Co　phases　in　cemented　carbide　are　gradually　connected,　Co　can　always　be　dissolved,　and　the　time　of　complete　dissolution　is　shortened.　In　cemented　carbide　with　high　Co　content,　the　time　of　complete　Co　dissolution　increases　with　increasing　Co　content.　The　dissolution　law　of　cemented　carbide　with　different　Co　content,　combined　with　the　effect　of　applied　potential　on　the　dissolution　of　cemented　carbide　derived　from　the　simulation,　provides　a　feasible　approach　to　improve　the　current　efficiency　and　shorten　the　actual　time　of　complete　dissolution　of　Co　in　cemented　carbide.　©　2023　The　Author(s).