Soft　ferromagnetic　materials　with　an　interface　crack　in　a　strong　magnetic　field　are　considered.　The　complex　potentials　for　the　plane　problem　are　deduced　based　on　Pao　and　Yeh＇s　linear　model　of　magnetoelasticity.　The　solution　of　coupling　Fields　is　obtained　by　solving　Reimann　continuation　problems.　Finally,　the　effects　of　the　applied　magnetic　field　and　the　material　constants　on　the　stress　singularity　near　the　crack　tip　are　discussed　by　examples　for　some　representative　soft　ferromagnetic　materials.