The invention discloses a method for removing manganese in a nickel cobalt hydroxide solution, relates to a manganese removal method for an acid solution of nickel cobalt hydroxide in nickel cobalt hydrometallurgy. The method is characterized in that according to the removal process, the nickel cobalt hydroxide solution is heated, sulfur dioxide gas is led in, nickel carbonate is added to adjust the pH of reaction slurry, and precipitation and removal are carried out on the manganese in the nickel cobalt hydroxide solution. According to the method, the sulfur dioxide gas is used as a manganeseprecipitation reagent, the nickel carbonate is used for adjusting the pH of a reaction process solution, and air is compressed to remove free sulphur dioxide remaining in the slurry; and in the wholemanganese removing process, no new ions are introduced into the system, valuable metal contained in slag is low, the slag can be directly used as manganese raw materials to be exported, and the method is a green and efficient manganese removal process method.