In　recent　years,　conjugated　polymers　have　become　the　materials　of　choice　to　fabricate　optoelectronic　devices,　owing　to　their　properties　of　high　absorbance,　high　quantum　efficiency,　and　wide　luminescence　tuning　ranges.　The　efficient　feedback　mechanism　in　the　concentric　ring　resonator　and　its　circularly　symmetric　periodic　geometry　combined　with　the　broadband　photoluminescence　spectrum　of　the　conjugated　polymer　can　generate　a　highly　coherent　output　beam.　Here,　the　detailed　design　of　the　ultralow-threshold　single-mode　circular　distributed　feedback　polymer　laser　is　presented　with　combined　fabrication　processes　such　as　electron　beam　lithography　and　the　spin-coating　technique.　We　observe　from　the　extinction　spectra　of　the　circular　gratings　that　the　transverse　electric　mode　shows　no　change　with　the　increase　of　incident　beam　angle.　The　strong　enhancement　of　the　conjugated　polymer　photoluminescence　spectra　with　the　circular　periodic　resonator　can　reduce　the　lasing　threshold　about　19　µJ/cm2.　A　very　thin　polymer　film　of　about　110　nm　is　achieved　with　the　spin-coating　technique.　The　thickness　of　the　gain　medium　can　support　only　the　zero-order　transverse　electric　lasing　mode.　We　expect　that　such　a　low　threshold　lasing　device　can　find　application　in　optoelectronic　devices.