Flexible　epitaxial　magnetic　oxide　nanostructures　with　different　electric　and　magnetic　characteristics　have　attracted　intensive　explorations　because　of　the　potential　applications　in　compact　flexible　devices.　However,　either　expensive　equipment　or　complicated　processing　is　often　indispensable　in　the　traditional　fabrication　technology.　Besides,　there　still　lacks　the　report　on　high-quality　metallic　or　half-metallic　oxide　nanocolumn　arrays　integrated　on　flexible　substrates,　which　is　one　of　the　most　important　part　in　the　future　all-oxide　nanostructure-based　flexible　spintronics.　Herein,　we　demonstrate　a　spontaneous　formation　method　to　fabricate　the　epitaxial　La0.67Sr0.33MnO3　nanocolumn　films　on　flexible　mica　substrates　with　an　SrTiO3　buffer　layer.　The　morphology　and　density　of　the　nanoscale　columns　can　be　easily　tuned　by　changing　the　film　thickness,　which　in　turn　influences　the　magnetic　properties　of　the　film.　Under　different　levels　of　bending,　the　films　exhibit　morphology-dependent　performance　during　the　ferromagnetic　resonance　measurements.　This　study　provides　a　viable　route　of　fabricating　tunable　nanostructures　for　flexible　spintronic　devices　with　optimized　performances.　(C)　2020　Elsevier　Ltd.　All　rights　reserved.