Gas long-distance pipeline magnetic flux leakage internal detection data multi-round alignment method and device

The invention belongs to the field of combination of a petroleum and natural gas pipeline internal detection technology and an artificial intelligence technology, and mainly relates to a gas long-distance pipeline magnetic flux leakage internal detection data multi-round alignment method and device, and the method comprises the following steps: respectively recognizing first-stage feature point data in two groups of magnetic flux leakage internal detection data needing to be aligned according to a feature point database, performing pipe section division on the pipeline to form a plurality of first-stage pipe sections; second-level feature points in the first-level pipe section are recognized, and the second-level feature points in the first-level pipe section are aligned for the first time through a pipe section splitting algorithm; performing alignment operation on the secondary feature points which are identified but not aligned again; the method is mainly used for solving the problem that the alignment pro