As an essential nutrient element of crops, silicon has been widely regarded by agricultural industry at home and abroad. Silicon fertilizer is a kind of good quality fertilizer, health fertilizer and plant regulating fertilizer, it is a new type of multi-function fertilizer that other chemical fertilizer can not compare with, it can also be used as soil conditioner to improve the soil. In addition, it also has the function of disease prevention, pest control and virus reduction. The silica sol contains inorganic silicon oxide, in the fertilizer industry is also emerging, gradually being used.