A　fault　diagnosis　method　of　rolling　bearings　based　on　local　characteristic-scale　decomposition　(LCD)　and　Teager　operator　is　put　forward.　First,　a　new　nonstationary　signal　method,　i.e.,　LCD,　is　illustrated　based　on　the　definition　of　the　intrinsic　scale　component　(ISC)　with　the　physical　instantaneous　frequency.　Second,　the　vibration　signals　were　collected　on　the　bearing　faults　test　rig,　and　the　signals　were　decomposed　into　several　intrinsic　scale　components　using　LCD.　Third,　the　Teager　envelope　spectrum　is　applied　to　the　selected　intrinsic　scale　component　which　stands　for　the　bearing　faults.　Finally,　the　intrinsic　frequency　of　the　faults　bearing　can　be　obtained.　Results　of　the　experiment　and　engineering　signals　of　bearings　show　that　this　method　can　effectively　diagnose　the　faults　of　bearing　and　it　can　be　applied　to　practical　applications.　©,　2015,　Beijing　University　of　Technology.　All　right　reserved.