In　this　work,　a　temperature　tunable　capillary-based　polymer　whispering　gallery　modes　laser　was　proposed.　The　WGM　laser　device　was　fabricated　by　filling　the　liquid　polymer　into　the　capillary　tubes.　Due　to　the　thermal-optic　effect　of　the　polymer,　the　emission　wavelength　of　the　laser　device　can　be　continuously　tuned　from　601.4　nm　to　581.9　nm　with　the　varying　temperature.　Moreover,　the　suppression　of　modes　was　observed　owing　to　the　two-ring　coupling　effect　in　the　capillary　cavity.　The　easy-fabricated　and　very　low-cost　method　of　the　temperature　tunable　WGM　laser　was　verified　which　exhibits　the　potentiality　for　applications　of　photothermic　and　sensing　devices.