In　this　paper,　we　used　femtosecond　laser　texturing　technology　to　prepare　the　LIPSS　structure　and　the　ablation　pit　structure　on　Ti6Al4V　alloy　surface　by　changing　experimental　processing　parameters,　we　found　that　compared　with　the　polished　surface,　when　the　laser　fluence　is　lower　than　0.1414 J/cm2,　the　obtained　LIPSS　structure　surface　is　easier　to　achieve　hydrophobicity,　and　when　the　laser　fluence　is　higher　than　0.1768 J/cm2,　the　obtained　ablated　structure　surface　is　easier　to　achieve　hydrophilicity.　In　addition,　the　spectral　properties　of　the　prepared　surface　micro-nano　structures　were　tested.　By　comparing　and　analyzing　the　spectra,　it　was　found　that　the　reflectivity　decreased　with　the　increase　of　laser　fluence　in　a　certain　range.　When　the　laser　fluence　is　0.7070 J/cm2,　the　light　trapping　structure　is　formed　on　the　surface　of　Ti6Al4V　alloy,　so　the　reflectivity　is　reduced　to　about　2.5%.　The　results　show　that　the　selective　regulation　of　spectrum　can　be　realized　by　changing　the　characteristic　scale　of　micro-nano　structure　on　solid　surface.　It　has　great　application　potential　in　aerospace,　biological　materials,　automotive　energy　and　other　fields.　At　the　same　time,　it　provides　a　certain　technical　basis　for　the　development　and　application　of　surface　modification　of　femtosecond　ultrafast　laser　micro-nano　technology　materials.　©　2022,　The　Author(s),　under　exclusive　license　to　Springer　Nature　Singapore　Pte　Ltd.