Abstract: Nano-sized titania (TiO↓2) is an important inorganic functional material,which has wide application in many fields.It′s widespread application causes its surface modification technology becoming a hotspot of research.Meanwhile,surface modification is an important method to improve titania′s performances and to expand its application domain.In this paper，the aim and mechanism of TiO↓2 modification were introduced.The different modification methods (inorganic modification and organic modification) and their application were summarized.Especially the most commonly used methods,such as coupling reagent,surfactant and polymer coating methods were introduced in detail.On these basis,the problems existed were put forwarded and the necessity of interface　compatibility improvement,the uniform dispersedness of nano-particles in base material and stability control were pointed out.At the same time,further research direction was also proposed.<BR>