In this paper,the preparation technology of inorganic nano ceramic coatings and the reaction mechanism of silane hydrolysis and condensation are introduced,and the influencing factors of silane hydrolysis are discussed.The experimental results and action mechanism were analyzed.It was found that the organic functional groups on different kinds of silane monomers,the types and adjustment of catalysts,the types of co-solvents and the colloid ageing process had great influence on the hydrolysis and condensation of silane in coatings.