The invention relates to a method for recycling bromine from bromine-containing wastewater, which comprises the following steps: acidification: adding hydrochloric acid or sulfuric acid into industrial wastewater containing bromide ions to adjust the pH value of the industrial wastewater to 3-5; oxidation: adding an oxidizing agent into the acidified industrial wastewater for oxidation to generate bromine; extraction: adopting n-dodecane as an extraction agent, adding n-dodecane into the oxidized industrial wastewater, and extracting bromine from an aqueous phase to an n-dodecane phase; liquid separation: performing liquid separation on the two-phase solution added with the extraction agent, wherein the upper layer is an oil phase, namely a bromine and n-dodecane solution, and the lower layer is an aqueous phase; separating the aqueous phase from the oil phase; rectification: rectifying the n-dodecane and bromine solution obtained by the liquid separation so that bromine is separated from n-dodecane to obtain a bromine product. In the method provided by the invention, bromine is extracted by a solvent extraction process; compared with the traditional bittern bromine extraction technology, the use of steam is greatly saved, the cost of whole bromine extraction is remarkably reduced, and better economic benefits are obtained.