The　relations　of　the　effective　index　and　the　normalized　frequency　with　an　index　and　temperature　have　researched　as　filling　methanol　for　photonics　crystal　fiber　(PCF)　of　the　hexagon　structure.　The　theoretical　model　of　the　photonics　crystal　of　total　internal　reflection　has　studied　in　plane　wave　expansion　method.　The　results　of　the　total　internal　reflection　(TIR)　PCF　temperature　characteristic　have　obtained　in　filling　the　liquid　material　of　high　refractive　index　temperature　coefficient.　The　refractive　index　of　filling　liquid　and　temperature　affect　on　the　effective　refractive　index　and　normalized　frequency.　The　effective　refractive　index　will　reduce　and　normalized　frequency　will　increase　as　the　temperature　increases.　When　the　distance　between　adjacent　holes　Lambda　remains　unchanged,　the　ratio　of　diameter　of　holes　d　and　Lambda　of　d/Lambda　is　greater　and　the　input　wavelength　is　longer,　the　effective　refractive　index　with　the　temperature　becomes　the　most　sensitively.　The　properties　are　valuable　for　design　and　application　of　temperature　sensors.