The invention relates to the field of analysis and testing, in particular to a method for measuring the content of halogen. Requirements on the accuracy of measuring the content of the chlorine ions and the content of the bromonium ions in products become higher and higher along with the constant deepening of non-halogenated requirements on industrial products. In the process of measuring the content of chlorine and the content of bromine in products, the invention makes improvement on the stage of processing a sample by the oxygen bomb combustion method, adding iodine ions into the existing absorption liquid so as to convert silver chloride precipitation and silver bromide precipitation into silver iodide precipitation, thereby enabling that the chlorine ions and the bromonium ions are free, facilitating the rear measurement of the chlorine content and the bromine content in products by utilizing ion chromatograph, and increasing the accuracy of detection.