The　photocatalytic　mixed　crystal　nano-TiO2　particles　were　incorporated　with　concrete　by　means　of　the　internal　doping　method　(IDM)　and　spraying　method　(SPM)　in　this　paper.　To　evaluate　the　photocatalytic　degradation　efficiency　of　mixed　crystal　nano-TiO2　concrete,　the　methyl　orange　(MO)　was　chosen　to　simulate　pollutants.　The　physicochemical　characteristics　and　photocatalytic　performance　of　mixed　crystal　nano-TiO2　concrete　prepared　by　above　two　different　methods　were　experimentally　investigated　under　UV　irradiation　and　solar　irradiation.　Furthermore,　the　effects　of　two　key　influential　factors　including　pollutant　concentration　and　irradiation　condition　were　also　analyzed　and　discussed.　Experimental　results　indicate　that　the　nano-TiO2　concrete　prepared　by　the　spraying　method　(SPM)　exhibits　maximum　photocatalytic　degradation　efficiency　of　73.82%　when　the　sprayed　nano-TiO2　slurry　concentration　is　10mg/L.　The　photocatalytic　degradation　efficiency　of　unpolished　nano-TiO2　concrete　is　much　higher　than　that　of　polished　nano-TiO2　concrete　under　the　same　exposure　time　of　UV　irradiation.　Moreover,　the　photocatalytic　degradation　efficiency　of　nano-TiO2　concrete　decreases　with　the　increase　of　pollutant　concentration.　The　irradiation　condition　has　an　obvious　influence　on　the　photocatalytic　degradation　efficiency　of　nano-TiO2　concrete.　In　the　aspect　of　applications,　the　practical　recommendations　for　the　nano-TiO2　concrete　with　self-cleaning　capacity　were　presented　according　to　the　experimental　results.　©　2020　Z.　Guo　et　al.,　published　by　De　Gruyter　2020.