NOVELTY - An anti-reflection coating composition having a pH of 7- 11, comprises: several zeolite nanocrystals having a particle size of 40-100 nm; a zeolite precursor obtained by a hydrolytic polycondensation of tetraalkoxysilanes in an aqueous solution of tetraalkylammonium hydroxide; and a solvent.    USE - As anti-reflection coating composition useful for forming an anti-reflection coating having a refractive index of 1.2-1.4 on an optical article (claimed); and for forming a transparent layer having a low refractive index on a substrate such as glass. The anti-reflection layer formed is particularly suitable for protective cover of flat panel display or photovoltaic solar panels.    ADVANTAGE - The coating composition can be used to form a transparent layer having a low refractive index i.e. a refractive index of 1.2-1.4 on a substrate for antireflection effect. The anti-reflection layer formed using the composition reduces the reflection of light over a broad spectrum, which is particularly suitable for protective cover of flat panel display or photovoltaic solar panels. The coating composition can be directly applied on the desired object and be converted to an effective zeolite anti-reflection film upon heat treatment. When the composition is coated onto substrate, it can be converted to a zeolite layer after only a short period of heating. The abrasive resistance can be adjusted by the ratio of the zeolite nanocrystals and the zeolite precursors in the sol. Since zeolite nanocrystals and zeolite precursor sol prepared from the hydrolytic polycondensation of tetraalkoxysilanes in tetraalkylammonium hydroxide aqueous solution was used, it is also different from prior art compositions, where the coating composition was a mixture of amorphous silicon oxide hydroxide nanoparticles, produced in an aqueous-alcoholic ammoniacal solution. In addition, the surface of the anti-reflection film formed using the composition is super-hydrophilic, thus preventing the surface from fingerprints by touching. The zeolite precursors transform into zeolite under heating, and serves as glue to bind the zeolite nanocrystals together and also bind the zeolite nanocrystals with the substrate. Therefore, the abrasive resistance of the anti-reflection film is improved.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an anti-reflection coating on an optical article, where the anti-reflection coating is made by heating the anti-reflection coating composition and has a refractive index of 1.2-1.4; and    (2) preparing the coating composition that produces low refractive index anti-reflection film involving: preparing a zeolite precursor sol; preparing zeolite nanocrystals colloid containing several zeolite nanocrystals; and mixing the zeolite nanocrystals with the zeolite precursor sol to form a coating mixture.