A　piece　of　domestic　polarization-maintaining　photonic　crystal　fiber　(PM-PCF,　964　m　in　length)　is　made　into　a　fiber　coil,　and　its　polarization　extinction　ratio　(PER)　is　measured　in　a　temperature　range　of　-45-　80　degrees　C　before　and　after　PM-PCF　is　wound　and　solidified.　A　fiber　coil　made　of　commercial　panda　PM　fiber　(PMF)　is　also　fabricated　and　measured　for　comparison.　Our　experiments　show　that　the　PER　variation　of　the　PM-PCF　coil　(2.25　dB)　is　far　smaller　than　that　of　the　panda　PMF　coil　(10　dB)　in　the　whole　temperature　range　because　PM-PCF　is　intrinsically　insensitive　to　the　temperature　variation　and　stress　in　the　fiber　coil　induced　by　the　winding　and　solidification　process.　This　characteristic　is　important　for　the　real　application　of　PM-PCFs　in　temperature-insensitive　fiber　interferometers,　fiber　sensors,　and　optical　fiber　gyroscopes.