In　this　paper,　the　effect　of　KrF　pulsed　excimer　laser　irradiation　on　the　structural,　surface　morphology,　photoluminescence　and　electrical　properties　of　ZnO　single　crystal　was　investigated.　Compared　to　the　as-grown　sample,　at　an　irradiation　energy　density　of　257　mJ/cm(2),　the　ZnO　single　crystal　exhibits　a　series　of　phenomenon:　XRD　and　Raman　results　show　that　the　crystallization　of　ZnO　quality　change　slightly,　resistivity　is　decreased　by　two　orders　of　magnitude,　carrier　concentration　is　increased　by　one　order　of　magnitude.　After　laser　irradiation,　the　surface　shows　some　strip　lines　and　no　cracks.　Formula　calculation　and　simulation　results　show　that　the　stripes　are　not　caused　by　surface　melting.　We　speculate　that　these　stripes　are　caused　by　the　precipitation　of　ZnO　material　inside　to　the　surface.　Due　to　the　reduction　of　oxygen　vacancies,　UV　emission　has　been　enhanced　and　visible　emission　has　been　declined　after　irradiation.　After　the　laser　irradiation,　the　visible　light　of　ZnO　surface　can　be　regulated.　The　experimental　results　show　that　KrF　laser　irradiation　could　effectively　improve　the　optical　and　electrical　properties　of　ZnO　single　crystal,　which　is　important　for　the　application　of　high　performance　of　emitting　optoelectronic　devices.　(C)　2016　Elsevier　B.V.　All　rights　reserved.