A　kind　of　curved　long-period　fiber　grating(CLPFG)　engraved　by　CO2　laser　based　on　oxide-doped　fiber　was　designed　to　monitor　the　structural　integrity　of　propellant.　The　mechanical　damage　characteristics　of　the　propellant　were　analyzed.　The　sensor　model　is　constructed　and　the　refractive　index　modulation　characteristics　of　the　CLPFG　are　analyzed.　The　strain　coupling　characteristics　and　the　strain　transfer　efficiency　of　the　interface　between　the　CLPFG　and　the　propellant　are　clarified.　Propellant　modules　with　implanted　CLPFG　were　fabricated.　The　novel　grating　sensor　has　been　effectively　coated　and　structurally　packaged.　Conducted　experiments　on　strain　and　temperature　of　propellant　modules.　The　large　strain　measurement　of　propellant　from　0　µε　to　24000　µε　is　realized.　Solved　the　thorny　problem　of　large　strain　measurement　for　propellants.　In　addition,　the　temperature　discrimination　measurement　in　the　temperature　range　of　30　℃　to　250　℃　can　be　realized.　Sensor　exhibit　extremely　high　stability　characteristics　and　has　good　compatibility　with　propellants.　The　sensor　implantation　and　extraction　structure　has　been　designed　to　improve　the　survival　rate　of　the　sensor　inside　the　solid　rocket　motors　(SRM).　Sensors　can　accurately　measure　the　mechanical　and　thermal　state　parameters　of　propellants,　providing　effective　data　support　for　the　health　management　of　SRM.　©　2024　Optica　Publishing　Group.