This study investigates the multiscale complexity and wave-number partitioning of airfoil boundary-layer fluctuating pressures measured in the NF-3 wind tunnel at Northwestern Polytechnical University. A multifractal asymmetric correction model is established. The energy cascade characteristics of transition and turbulence are studied via proper orthogonal decomposition (POD). The results indicate that during the transition, the multifractal spectrum width of fluctuating pressure expands to appr