A　novel　generation　method　of　oscillatory　rotating　eddy　current　(OREC)　is　proposed　to　solve　the　problems　in　the　conventional　rotating　eddy　current　(REC)　method.　Although　the　REC　method　can　provide　the　uniform　sensitivity　to　all　the　cracks　with　different　distribution　angles　in　non-ferromagnetic　materials,　eddy　current　signal　patterns　can　be　applied　only　in　the　rough　quantification　of　crack　orientation.　In　ferromagnetic　materials,　due　to　the　cancellation　effect　between　the　magnetic　flux　leakage　and　eddy　current　mechanisms,　when　the　angle　between　the　crack　direction　and　the　excitation　current　direction　was　about　45　degrees,　it　was　difficult　to　detect　the　crack　with　the　conventional　REC　method.　Therefore,　amplitude-modulated　excitation　currents　were　introduced　into　the　REC　test　and　then　oscillatory　rotating　eddy　current　are　induced　to　interact　with　the　cracks　in　the　study.　The　frequency　of　the　modulation　signal　determined　the　spatial　rotation　speed　of　the　OREC　field.　Then,　the　compound　profiles　of　the　detected　carrier　signals　were　extracted　and　redrawn　in　the　polar　diagram　to　demonstrate　8-shaped　or　4-Plsignal　patterns.　Finally,　the　angle　between　straight　lines　connecting　the　maximum　signal　positions　of　8-shaped　or　4-Pl　trajectories　was　estimated　as　the　feature　parameter　for　determining　crack　orientation.　The　feature　parameter　was　used　to　characterize　all　the　cracks　with　different　distribution　angles　in　both　non-ferromagnetic　and　ferromagnetic　materials.　The　proposed　OREC　method　realized　an　angular　resolution　of　15　degrees　in　crack　orientation　determination.