Salt inhibitor as well as preparation method and application thereof

The invention discloses a salt inhibitor as well as a preparation method and application thereof. The salt inhibitor is prepared from polyacrylic acid, sodium polyacrylate, a maleic acid-acrylic acidcopolymer, polyepoxysuccinic acid and hydrolyzed polymaleic anhydride in a volume ratio of (20-50):(30-40):(20-25):(10-20):(10-20). The salt inhibitor is prepared by stirring and mixing the componentsaccording to the volume ratio in a normal-pressure reaction kettle. The salt inhibitor can change the salt crystallization process in a solution and the adhesive force on the surfaces of salt particles to the maximum extent, the number of crystal nucleuses is greatly increased and the salt crystallized particles become fine; meanwhile, the binding force between the salt particles becomes extremely weak, the salt particles are not prone to being gathered into large particles, and therefore formation of large salt blocks is restrained, stopped or reduced. The salt inhibitor can be used for treating salt-containing waste