In recent years,nano-technology develops rapidly,and the research of organic-inorganic nanocomposites prepared by the composition of inorganic nano-particles and polymer becomes an important direction of the development of material science. The preparation methods, properties and characteristics of organic-inorganic nanocomposites are summarized. The applications of organic-inorganic nanocomposites are introduced and potential prospects of organic-inorganic nanocomposites are also expected.