In　this　paper,　the　theoretical　model　of　high　birefringence　photonic　crystal　fiber(PCF)　has　proposed　by　the　plane　wave　expansion　method.　The　temperature　impacts　of　the　birefringence　and　beat　length　in　high　birefringence　PCF　which　filled　with　ethanol　were　numerical　analyzed.　The　results　show　the　refractive　index　of　filling　liquid　significantly　influence　on　the　birefringence　and　beat　length.　When　the　wavelength　increases,　the　birefringence　increases　while　the　beat　length　decreases,　when　the　temperature　increases,　the　birefringence　also　increases　while　the　beat　length　decreases.　In　addition,　the　temperature　affected　the　birefringence　and　beat　length.　Especially　the　birefringence　of　high　birefringence　PCF　is　more　sensitive　to　temperature.　When　the　wavelength　is　longer,　these　results　for　design　temperature　sensors　have　certain　reference　significance.