Starch dust suppressant and preparation method thereof

The invention discloses a starch dust suppressant and a preparation method thereof. The starch dust suppressant is prepared by the following method: neutralizing a monomer raw material containing acrylic acid until the neutralization degree is 50-90%; adding 0.01-0.09 g of an N-N '-methylene bisacrylamide cross-linking agent, and uniformly stirring to obtain a mixture; adding starch into the mixture, wherein the molar ratio of starch to acrylic acid is 0.25-1.25: 1, and uniformly mixing; adding 0.3-1.5 g of an ammonium persulfate initiator, and uniformly mixing to obtain a reaction material;putting the reaction material into a ball milling tank of a stirring ball mill, adding a ball milling medium with the diameter of 4-8mm according to the material-ball volume ratio of 1: (6-12), stirring and reacting for 1-5 hours at the temperature of 30-70 DEG C at the rotating speed of 380-580 revolutions per minute, and separating the ball milling medium after the reaction is finished to obtaina reaction product; soakin