The invention discloses a high-molecular coagulation cohesive dust suppression agent and a preparation method thereof. The dust suppression agent is prepared from the following components: 0.5-1.0% ofhydroxyethyl
cellulose, 1-2% of
polyacrylamide, 2-4% of
itaconic acid, 0.01-0.03% of an initiator, 0.01-0.02% of a cross-linking agent, 0.01-0.02% of an anti-freezing agent, 0.01-0.02% of a surfactant and the
balance water. The dust suppression agent and the preparation method thereof have the advantages that the
hydroxyethyl cellulose serves as a matrix and is subjected to graft copolymerizationreaction with the
polyacrylamide, so that the
frictional resistance of a solution is reduced, the liquidity of the solution is improved, then a proper amount of
itaconic acid is grafted to enable thesolution to become
colloid with relatively good liquidity and diffusivity, the anti-freezing performance of the dust suppression agent is improved by adding a small amount of anti-freezing agent, dust can be covered, a dense
coating is formed on the surface of the dust, after the dense
coating becomes dry and hard, the dense
coating and dust together form a hard shell, the dust suppression agenthas the advantages of being non-toxic,
environmentally friendly, low in price and biodegradable, and secondary environmental
pollution is avoided.