The invention relates to a method for measuring the content of zirconium in a metallurgical product, in particular to a method for measuring the content of zirconium in a tungsten-zirconium alloy. The method comprises the following steps: (1) adding sulfuric acid and ammonium sulfate into a tungsten-zirconium alloy sample, heating the obtained mixture until the sample is completely decomposed, and then cooling the obtained product; and adding water and coprecipitator into the obtained product, then adjusting the obtained mixture by utilizing aqueous ammonia until the ammoniacal mixture is excessive and the pH value of the solution is greater than or equal to 8, washing the obtained precipitate into an original beaker, and transferring the solution to a volumetric flask; and (2) adding a reagent solution into an arsenazo III solution (0.25g/L), complementarily adding hydrochloric acids into the obtained mixture, then diluting the obtained solution with water until the height of the solution reaches a scale, and shaking the obtained solution uniformly; and measuring the absorbance of the solution at the position of 670 nm. The method provided by the invention has the advantages of less disturbance, good accuracy and capability of meeting the requirements for measuring the content of the zirconium in the tungsten-zirconium alloy the mass fraction of which is 0.5 to 2 percent, and is simple and easy to operate.