The PVC polymerization system prepared from Tianshan Xiangyun cellulose ether products has good apparent properties, excellent particle characteristics, and excellent melt rheological behavior. In the composite dispersant system, the combination of polyvinyl alcohol (PVA) with different alcoholysis and polymerization degrees and hydroxypropyl methyl cellulose (HPMC) is better, which is beneficial for the resin to be loose and porous, and also for the absorption of plasticizers. In daily chemical products, it can improve the viscosity, dispersion, and stability of various products. It contains a certain amount of surfactants, and when used as a thickener for dishwashing detergent and hand sanitizer, it can prevent stratification, thinning, deterioration, and adhesion.