A　trajectory　monitoring　method　and　system　of　rotation　shaft　center　based　on　swept-source　optical　coherence　multi-point　vibrometer　(SSOCMV)　were　proposed　by　the　combination　of　frequency-division　multiplexing　technique　and　swept-source　optical　coherence　vibrometer,　which　have　advantages　of　non-contact,　non-invasive,　high　accuracy　and　simultaneous　muti-point　vibration　measurement.　Firstly,　the　system　composition　and　measurement　principle　of　SSOCMV　were　introduced　and　analyzed.　Then,　the　experimental　comparison　system　was　set　up　to　verify　the　measurement　accuracy　of　the　SSOCMV　system,　and　the　eddy　current　sensor　was　installed　in　a　symmetrical　position　of　the　probe　of　the　SSOCMV　system　to　synchronously　monitor　the　trajectory　of　rotation　shaft　center,　so　as　to　compare　the　measurement　results　of　these　two　systems.　The　experimental　results　show　that　the　trajectory　monitoring　system　of　rotation　shaft　center　based　on　SSOCMV　has　a　higher　displacement　resolution　and　a　better　signal　to　noise　ratio　(SNR)　than　eddy　current　sensor.　Therefore,　the　SSOCMV　has　a　good　application　prospect　in　the　rotating　mechanical　condition　monitoring,　parameter　identification　and　fault　diagnosis.　©　2023　Editorial　office　of　Journal　of　Applied　Optics.　All　rights　reserved.