The invention discloses a method for fast encapsulating and analyzing cyclically-scanned ultrasonic flaw detection data. The method comprises the following steps: correcting and encapsulating the flaw detection data of ultrasonic multi-probe combination system; automatically selecting the corrected and encapsulated flaw detection data of artificial defects of a sample plate wheel, and conducting calibration and check analysis; and after a qualified check, carrying out detection analysis to judge defects. The method can automatically encapsulate collected data detected by wheel ultrasonic waves, correct the scanning initial-position and the defect detecting position of an ultrasonic channel, and accurately and quickly extract defect information. In the calibration and check process, the selecting program of a defect indication box can automatically select artificial defect images of the sample plate wheel and is matched with a defect box translation instruction to quickly and accurately complete the calibration and check process. In the detection process, a pseudo-defect distinguishing algorithm is introduced, automatic flaw judgment and manual flaw judgment are combined to judge defects, and the defect detection efficiency of a multi-probe ultrasonic detection system is increased.