By scrutinizing the lunar soil samples retrieved by Chang'e-6, the research team has deciphered the enigma surrounding the weak lunar crustal magnetic field and the unusually strong soil magnetism observed in the South Pole-Aitken Basin on the Moon's farside. The findings indicate that the magnetization capacity of the lunar soil in this region is exceptionally high, vastly surpassing that of samples collected from the Moon's nearside. The lunar soil harbors two distinct types of magnetic carrier particles, each with different origins, along with three varieties of metallic iron particles resulting from "secondary alteration." These components significantly influence the magnetic recording properties of the soil. Given the region's characteristic weak magnetic field yet abundant magnetic minerals, it is hypothesized that the intense magnetic field at the basin's northern edge may be linked to the accumulation of highly magnetic exogenous metal sputters. This research offers a pivotal foundation for comprehending the history of the lunar magnetic field and surface evolution, while simultaneously pioneering a novel path for the study of magnetic minerals and magnetic field evolution across other celestial bodies.