In　this　paper,　we　present　a　narrow　linewidth　vertical　cavity　surface　emitting　laser　(VCSEL)　based　on　cholesteric　liquid　crystal　(CLC).　We　investigated　the　impact　of　incorporating　optical　feedback　into　the　external　cavity　on　the　linewidth　of　VCSELs,　and　successfully　utilized　CLC　film　as　the　reflector　for　the　external　cavity.　This　enabled　us　to　achieve　mode　control　and　linewidth　compression　in　VCSELs　through　optical　feedback.　The　linewidth　of　the　optically　feedbacked　VCSEL　was　measured　at　different　driving　currents　and　oxidation　apertures.　Under　the　same　oxidation　aperture,　when　the　driving　current　is　1.2　mA,　the　linewidth　is　compressed　from　120.9　MHz　to　55.97　MHz;　when　the　driving　current　is　0.8　mA,　the　linewidth　is　compressed　from　22.87　MHz　to　12.68　MHz.　When　the　driving　current　remains　constant,　the　linewidth　is　compressed　from　169.31　MHz　to　72　MHz　when　the　oxidation　aperture　is　7　μm;　and　from　39.13　MHz　to　10　MHz,　when　the　oxidation　aperture　is　3　μm.　By　validating　the　feasibility　of　employing　CLC　film　as　an　external　cavity　reflector　mirror,　our　findings　offer　new　insights　towards　achieving　narrow-linewidth　external　cavity　systems,　thereby　laying　an　experimental　foundation　for　subsequent　high-quality　and　highly　integrated　LC　optical　feedback　VCSELs.　　©　Published　under　licence　by　IOP　Publishing　Ltd.