Ultra-low-volume spray is currently recognized as an advanced spraying method in the world. The choice of sprayer depends on the use environment. Ultra-low-volume spray is generally suitable for indoor disinfection in farms and other places. Choosing ultra-low volume sprayers generally choose products with small droplet diameter, strong penetration, large spray range, fast diffusion and slow landing. Moreover, different use conditions and use environments have different requirements for the liquid medicine contained in the sprayer. It is recommended to choose an ultra-low-volume sprayer with edible special medicines and medicaments, which can save costs and increase service life.