The invention discloses a method for detecting the content of chromium in ferrochrome. The method comprises the following steps: (1) dissolving a ferrochrome sample, and destroying carbides, wherein amedium-and-low-carbon ferrochrome sample is dissolved by concentrated hydrochloric acid, concentrated nitric acid and a phosphoric acid and sulfuric acid mixed acid, and a high-carbon ferrochrome sample is dissolved through the steps of sodium peroxide addition, heat melting, phosphoric acid and sulfuric acid addition and boiling; (2) oxidizing Cr<+3> into Cr<+6> by using silver nitrate as a catalyst and ammonium persulfate as an oxidant, adding sodium chloride, and heating the obtained solution until the solution is clarified; (3) adding 2-3 drops of an N-phenylanthranilie acid indicator, and performing titration by using an ammonium ferrous sulfate standard solution; and (4) calculating the content of chromium according to the consumption of the ammonium ferrous sulfate standard solution. The method can be used to rapidly detect the chromium content, and is mainly used for detecting the content of chromium in ferrochrome.