Technology of amorphous nanosilica sols, gel and powders production from hydrothermal solutions and it’s physical and chemical characteristics was considered. Examples of hydrothermal nanosilica application for rising productivity of agricultural animals such cows, pigs, hens, bees were discussed. By application of hydrothermal nanosilica crop capacity of potato, wheat, cabbage, mustard, topinambur, amaranth and other plants was achieved.