The invention discloses a digital calibration method based on a t distribution inspection method. The digital calibration method based on the t distribution inspection method comprises the following steps: carrying out t distribution inspection on continuous m sampling values of a channel which requires to be corrected to get rid of abnormal values, and recalculating according to a formula; carrying out circular correction; setting the most circulating K times; forcedly withdrawing if the circulating times are exceeded; and processing quantiles of the circulated sampling values to obtain finalsampling data. The data sampling precision of the channel can be improved, and digital quantity parameters are calibrated.