Dust falling and suppressing agent as well as preparation method and application thereof

The invention belongs to the technical field of dust treatment, and provides a dust falling and suppressing agent as well as a preparation method and application thereof. The viscosity modifier water-soluble cellulose and polyvinyl alcohol in the dust falling and suppressing agent provided by the invention can provide a proper amount of hydroxyl and carboxyl in a non-binding state in a system, and due to the existence of the groups, after the dust falling and suppressing agent is in interactive contact with dust, the contact angle of the dust can be quickly changed, so that the wettability of the dust is improved; a coagulant and a surface tension regulator in the dust falling and suppressing agent can accelerate dust coagulation; the surface tension regulator plays an important role in improving the dispersity of the coagulant; in addition, the coagulant and the surface tension regulator can further reduce the Zeta potential among the dust through wetting contact, so that the dust is coagulated and then sett