Abstract: According to the problem of high viscosity with high concentration of zinc salt initial titanium dioxide slurry,factors such as the amount of salt treatment agent,the S content of the initial titanium dioxide,surfactant,slurry temperature and pH were systematically studied.The results show that with the increase of potassium salt amount,the viscosity of the slurry increases first and then decreases.As the amount of zinc salt increases,the viscosity of the slurry gradually decreases.With the increase of phosphate amount,the viscosity of the slurry increases.The lower the S content in the initial titanium dioxide,the lower the slurry viscosity.The initial titanium dioxide slurry with polymer surfactants has a lower viscosity than the slurry with small-molecule surfactants.The slurry by Raymond mill grinding has a slightly lower viscosity than that by the roller-grinding.The more the amount of surfactants,the lower the slurry viscosity.Higher slurry concentration leads to a higher viscosity of the slurry,while a higher slurry temperature results in a lower viscosity of the slurry.With pH increases,the viscosity of the slurry decreases first and then increases.This study provides technical guidance for reducing the viscosity of the slurry of zinc salt initial titanium dioxide.