The　cold　rolling(CR)reduction　dependence　of　microstructure　evolutions　and　mechanical　properties　for　Al0.5CoCr0.8FeNi2.5V0.2　high-entropy　alloy(HEA)were　investigated.The　HEA　remains　FCC　structures　consisting　of　nanoscale　ordered　L12　phase,confirming　the　phase　formation　prediction.With　increasing　CR　reduction,the　textures　transform　from　random　ones　to　FCC　rolling　ones　accompanied　by　dense　slip　bands　and　deformation　twins.Under　a　50％CR　reduction,the　deformation　textures　started　to　become　evident　and　were　governed　by　typical{111}＜112＞F,{110}＜100＞Goss　and{112}＜111＞Cu　texture　components.When　the　CR　reduction　approached　90％,the　deformation　textures　mainly　contained　the{110}＜111＞A,{114}＜110＞X,and{112}＜111＞Cu　texture　components.As　a　result,both　Vickers　hardness　and　ultimate　strength　increased,but　the　ductility　decreased　roughly.The　enhanced　strength　should　be　attributed　to　the　anisotropy　and　work　hardening　behavior　from　textures.The　plastic　deformation　for　the　samples　under　low　CR　reductions　was　dominated　by　deformation　twins　and　slip　bands.However,under　high　CR　reductions,the　textures　severely　impeded　the　further　propagation　of　pre-existing　slip　bands,leading　to　the　rapid　decrease　of　ductility.Therefore,the　CR　reduction　should　be　carefully　designed　before　optimal　heat　treatments　to　enhance　the　strength　and　ductility　synergy.