The invention belongs to the technical field of printing and dyeing raw material treatment, and particularly relates to a method for dye sodium alginate thickening beating. The method is to adjust dye sodium alginate thickening into required viscosity by one time, and is characterized in that the dosage of sodium alginate can be calculated according to a calculation formula. The method has the benefits that compared with the existing thickening adjustment method in the background art, the method can accurately work out the mass of sodium alginate when the thickening is beaten into the required viscosity by one step, waste of manpower and material resources and time caused by repeated preparation can be saved, and the result accuracy is higher when the method is adopted.