In　this　paper,　the　fabrication　and　characterization　of　a　heterojunction　solar　cell　based　on　p-Cu2O/n-ZnO　nanowires　on　ITO　glass　are　presented.　ZnO　aligned　nanocrystal　seed　layer　is　firstly　prepared　by　RF　magnetron　sputtering　technique,　and　then　vertical　ZnO　nanowire　arrays　with　an　acicular　crystal　structure　are　obtained　by　using　a　chemical　bath　deposition　processing.　The　results　indicate　that　the　ZnO　nanowires　with　a　diameter　of　about　50　nm　and　500　nm　in　length　can　be　easily　obtained.　The　absorption　and　transmittance　of　the　ZnO　nanowires　are　studied.　It　is　also　noted　that　the　Cu2O　can　fill　well　into　the　space　between　ZnO　nanowires　by　an　electrodeposition　process.　Furthermore,　the　effect　of　the　Cu2O　orientation　on　the　cell　performance　is　also　presented.