The invention discloses a sintering fluxing agent proportioning adjusting method. The sintering fluxing agent proportioning adjusting method comprises the following steps that material flow deviationbetween an actual flow value and a theoretical flow value in unit time is obtained, the material flow deviation in each unit time period is detected, whether the material flow deviation is within an early warning range or not is judged, and the early warning range is a numerical value deviation range relative to the theoretical flow value; if the judgment result is yes, an originally set frequencyis reversely adjusted according to the material flow deviation to obtain a newly set frequency, when the actual flow value is smaller than the theoretical flow value, the originally set frequency isincreased to obtain a newly set frequency, and when the actual flow value is larger than the theoretical flow value, the originally set frequency is reduced to obtain a newly set frequency; a variablefrequency feeding device is enabled to perform feeding according to the newly set frequency; if the judgment result is no, an alarm is sent, the deviation value is too large, and manual interventionneeds to be performed; and when the actual flow value deviation is relatively small, the feeding amount is changed by adjusting the feeding frequency, so that the feeding amount is close to the theoretical flow value, the content of CaO in the fluxing agent is kept relatively stable, and the alkalinity of a final finished product is ensured to be stably controlled.