Anti-ionic suspension thickener as well as preparation method and application thereof

The invention discloses an anti-ionic suspension thickener as well as a preparation method and application thereof. The preparation method of the suspension thickener comprises the following steps: carrying out primary dispersion polymerization on a long-chain alkyl unsaturated monomer in a water-alcohol solution to generate a polymer chain segment, dealcoholizing, and carrying out secondary emulsion polymerization in a water solution, so that the long-chain alkyl chain segment stably exists in the polymer chain segment; the characteristic of difficult polymerization caused by difficult migration in a water phase due to extremely poor solubility when the long-chain alkyl unsaturated monomer is directly subjected to emulsion polymerization is avoided; meanwhile, a main chain segment with high acid content can be obtained through the secondary polymerization process, and due to the characteristics of emulsion polymerization, the polymer chain segment containing long-chain alkyl and the main chain segment with h