Powdered potassium nitrate anti-blocking agent and preparation method thereof

The invention discloses a powdered potassium nitrate anti-blocking agent and a preparation method thereof. The anti-blocking agent is prepared from the following components: 20 to 60 percent of crystal control agent, 10 to 30 percent of lubricant, 10 to 20 percent of scattering agent, 10 to 30 percent of water repellent agent, and 1 to 5 percent of flame retardant. The potassium nitrate anti-blocking agent is added after the crystallization and before the drying of the potassium nitrate, so that not only are the problems that the production efficiency is low due to the addition of the potassium nitrate anti-blocking agent before the crystallization, the potassium nitrate is complicated in components, foamed and abnormally crystallized and the like solved, but also compared with the liquid, the phenomenon such as the long drying time caused by the excessive water and the yellowing of the appearance of the potassium nitrate can be avoided, and the quality is better; and moreover, the application cost and the pr