Nano materials in structural and optical and chemical properties of the attractive features such as caused physicists, materials scientists and chemists keen interest. The beginning of the 1980s after the formation of the concept of nano-materials, the rest of the world paid great attention to such materials. It is the unique physical and chemical properties that make people aware of its potential for physics, chemistry, materials, biology, medicine and other disciplines bring new opportunities for research. Nano-materials, very broad application prospects. In recent years, it has been in a certain field of chemical production applications, and demonstrated its unique charm. 1. The application in catalysis Chemical catalysts in many areas play a decisive role, it can control the reaction time, improving their efficiency and velocity response. Most traditional catalytic efficiency of the catalyst is not only low, but their preparation is experience, not only caused a great waste of raw materials in the production, and increase cost-effectiveness, but also caused pollution to the environment. Nanoparticle Surface Active, as it provided the necessary conditions for the catalyst. Nanoparticles to catalyze the reaction efficiency can be greatly enhanced by controlling speed, not even the original can be used for the reaction. Nanoparticle catalyst for the reaction than the average speed of 10-15 times the catalyst. Nanoparticles as a catalyst used in the semiconductor photocatalyst, especially in the area of organic preparation. Dispersed in the solution of a semiconductor particles, similar to a short-circuit as the micro-batteries, and energy than the bandgap semiconductor illumination semiconductor decentralized system, the semiconductor nanoparticles have e-absorption -- hole right. In the electric field, electron hole separated from the surface of the particles were moved to different positions, and the solution is similar to components of oxidation and reduction reactions. Photocatalytic reaction involves many different types of chemical reactions, such as alcohol and hydrocarbon oxidation, redox inorganic ions, organic catalytic hydrogenation and dehydrogenation, amino acids, nitrogen fixation reaction, water purification, the water-gas shift, some of heterogeneous catalysis is hard to achieve. Semiconductor-effective catalyst for the degradation of organic pollutants in water. For example, TiO2 photocatalytic activity of both higher, while acid, and light stable, non-toxic, inexpensive and easy to get is the best choice for Preparation of photocatalyst. The article has reported that the use of silica matrix, which yielded higher catalytic activity TiO/SiO2 supported catalysts. Ni Cu or Zn compound of a nano-particles of certain organic compounds are excellent hydrogenation catalysts can replace expensive platinum catalyst or buttons. Nano Platinum black ethylene oxide catalysts reaction temperature from 600 ° C to room temperature. Reaction nanoparticles used as a catalyst to improve efficiency, optimize the reaction paths and improve the speed of response, the future is an important research topic in catalytic science can not be ignored, it is very likely that the catalyst to bring about revolutionary changes in industrial applications.