The　formation,　electronic　structure　as　well　as　optical　properties　of　the　(100)　plane　low　dimensional　TiO2　based　material　was　researched　by　ultra-soft　pseudo-potential　density　functional　theory　method.　The　results　show　that　the　formation　enthalpy　of　(100)　plane　low　dimensional　TiO2　based　material　is　larger　than　that　of　the　bulk　material,　its　stability　is　relatively　lower.　The　band　gap　of　(100)　plane　low　dimensional　TiO2　based　material　is　2.760　eV,　which　is　larger　than　that　of　the　bulk　material.　The　band　gap　is　indirect.　The　top　valance　band　and　the　bottom　conduction　band　is　composed　by　O　p　and　Ti　d　electrons,　the　O　p　and　Ti　d　electrons　have　strong　localized　interaction　at　-2.5　eV.　The　electron　localization　trend　is　strengthened　for　the　(100)　plane　low　dimensional　TiO2　based　material,　the　ionic　bonds　between　Ti　and　O　are　enhanced.　There　is　strong　reflectivity　at　140.8　nm　for　the　(100)　plane　low　dimensional　TiO2　based　material,　the　reflectivity　is　23.9%.　It　has　strong　absorption　at　34.5　nm　and　it　has　strong　loss　function　both　at　33.3　nm　and　138.9　nm.　©　2019,　Chinese　Ceramic　Society.　All　right　reserved.