Polarization　maintaining　fiber　can　reduce　the　influence　of　uncontrollable　birefringence　or　polarization　mode　dispersion　caused　by　environmental　disturbance　on　transmission　through　artificially　introduced　high　birefringence,　and　has　applications　in　precision　interference　sensing,　laser　systems,　optical　communication,　etc.　Compared　with　traditional　solid　core　fiber　which　is　limited　by　the　intrinsic　defect　of　material,　hollow　core　fiber　can　confine　the　optical　field　in　low　refractive　index　air　core　by　specific　microstructure　design,　with　low　delay,　low　dispersion,　low　nonlinearity,　high　photoinduced　damage　threshold,　anti-interference　and　high　flexibility　of　filling　liquid　or　gas.　Hollow　core　fiber　which　have　polarization-maintaining　feature　can　not　only　exert　its　performance　advantages　in　the　above　applications,　but　also　show　broad　prospects　in　high-power　pulsed　laser　transmission　and　biochemical　analysis　application.　In　this　paper,　the　development　of　polarization-maintaining　hollow　core　fiber　is　briefly　reviewed,　and　its　design　concepts　and　fabrication　techniques　are　discussed.　©　2019,　Science　Press.　All　right　reserved.