Disclosed　is　a　two-dimensional　quantitative　diagnosis　method　for　an　outer　ring　defect　of　a　rolling　bearing.　The　method　divides　a　fault　shock　oscillation　type　into　Class　1　and　Class　2　according　to　signal　waveform　characteristics　thereof.　With　regard　to　a　Class　1　outer　ring　defect,　　the　circumferential　dimensions　of　the　defect　are　first　quantitatively　diagnosed　based　on　a　proposed　circumferential　dimension　calculation　formula　for　the　Class　1　outer　ring　defect;　　and　two-dimensional　quantitative　diagnosis　of　the　Class　1　outer　ring　defect　is　completed　by　a　proposed　center　position　dimension　calculation　formula　for　the　Class　1　outer　ring　defect.　With　regard　to　a　Class　2　outer　ring　defect,　　the　circumferential　dimensions　of　the　defect　are　first　quantitatively　diagnosed　based　on　a　proposed　circumferential　dimension　calculation　formula　for　the　Class　2　outer　ring　defect;　　then,　　σvh　values　of　left　and　right　edges　of　the　outer　ring　defect　are　respectively　calculated;　　and　finally,　　center　position　dimensions　of　the　outer　ring　defect　are　diagnosed　by　a　proposed　center　position　dimension　calculation　formula　for　the　Class　2　outer　ring　defect,　　so　that　the　two-dimensional　quantitative　diagnosis　of　the　Class　2　outer　ring　defect　is　completed.