Sectional adjustment method applied to low-voltage intelligent switch protection

The invention discloses a segmented adjustment and calibration method applied to low-voltage intelligent switch protection. The segmented adjustment and calibration method comprises the following steps: step 1, selecting a plurality of current effective value correction points; step 2, obtaining an original current effective value corresponding to each correction point; 3, associating the original current effective value of each correction point with the corresponding theoretical current effective value to form a data pair of each correction point, and storing the data pair; and step 4, converting the collected current original waveform data into an original current effective value, then finding a segment where the original current effective value is located, and calculating a system cognitive current effective value corresponding to the current original current effective value according to the data pair of the starting point correction point and the data pair of the terminal point correction point of the seg