The invention provides a method for determining the content of chlorine in a nuclear-grade zirconium material. The method comprises the following steps: step one. cutting the nuclear-grade zirconium material into solid samples with the mass of 2.0g-3.0g; step three. firstly pickling the solid samples for 5 seconds-30 seconds, then cleaning the pickled samples for 10 seconds to 50 seconds by using acetone, putting the samples in a drying oven, drying the samples at the temperature of 50-60 DEG C, and removing pollution layers on the surfaces of the samples so as to ensure the cleanliness of the samples; and step three. dissolving the pretreated samples by using dissolving liquid, then adding 0.6ml of 100ppm Cl standard solution, and determining the content of chlorine in the solid samples by using an ionic concentration instrument. The method can be used for overcoming the shortcomings of a conventional measuring method and meet the detection requirements of the nuclear-grade zirconium material.