Nano-silver solution is a mixture of silver monomers in 1-100 nanometers of metallic silver, is a safe and non-toxic widely used sterilization and disinfection of a solution with a wide range of bactericidal effects, which can act directly on the cell membrane proteins in bacteria, destroy the bacterial cell membrane and oxidative metabolism enzyme binding, impede the bacteria and other microorganisms on the amino acids, uracil and other growth of the nutrients necessary for the uptake of nutrients to inhibit the growth of its And it can combine with the cell wall of bacteria rapidly, which can kill the bacteria within several minutes, and it has significant killing effect on more than 650 kinds of bacteria. At the same time, it also has the role of promoting the repair of damaged epithelial cells. Nano-silver is also widely used in catalytic materials, optical materials, biomedical, new energy and electronic devices, etc. In 2021, China's nano-silver production amounted to 23,500 tons, with an output value of 186.8 billion yuan, and it is expected that the nano-silver market size in 2025 will reach 226 billion yuan.