The invention relates to a purification method of 1,1-dibromo-1,2,2,2-tetrafluoroethane and belongs to the field of chemical synthesis. According to the purification method of 1,1-dibromo-1,2,2,2-tetrafluoroethane, a material contains 1,2-dibromo-1,1,2,2-tetrafluoroethane impurities, the method is an extractive distillation method, an extraction agent is a mixture of benzene or xylene and a nonpolar solvent with the boiling point higher than 80 DEG C, the mass ratio of benzene, m-xylene or o-xylene to the nonpolar solvent is (5: 1)-(1: 1.5), and the mass ratio of the extraction agent to the material is 1: (10-30). The specific mixed extraction agent is adopted, the content of 1,2-dibromo-1,1,2,2-tetrafluoroethane in the product subjected to extractive distillation purification is lower than 0.10%, the residual extraction agent is lower than 50 ppm, and the 1,1-dibromo-1,2,2,2-tetrafluoroethane product meets the practical requirement.