Vanadium extracting method capable of dynamically adjusting acid

The invention provides a vanadium extracting method capable of dynamically adjusting acid, which belongs to the technical field of vanadium extraction process. According to a technical scheme in the invention, the method comprises the following steps: determining a feed ratio of an extraction stock solution to an organic phase according to the extraction saturation concentration of the organic phase and the content of to-be-extracted metal in the extraction stock solution and determining the total adjusting amount of acid according to the feeding amount of the extraction stock solution, an acid-base value and the desired amount of acid in transformation of an extractant; and simultaneously adding a dilute sulphuric acid solution in two or three sections in the process of extraction so as to allow the pH value of the extraction stock solution to rapidly arrive at acidic extraction conditions. The method has the following beneficial effects: since extraction and acid adjustment are carried out synchronously, the problem that an extraction procedure is severely influenced and cannot be normally carried out caused by precipitation of vanadic acid when the pH value of the extraction stock solution is pre-adjusted to 1.5 to 2.5 is overcome, the procedure of pre-transformation of the extractant is omitted at the same time, and process flow is simplified.