The invention relates to the field of disposable hygiene products, and discloses a reinforced structural diaper with a composite core, which includes a diaper body, and the diaper body is composed of an air-permeable surface layer, a diversion layer, a composite core body, and a leak-proof bottom layer. Bonded with degradable hot-melt adhesive, the composite core consists of a dust-free paper, an upper absorbent layer, an elastic layer, a lower absorbent layer, and a spun-bonded non-woven fabric from top to bottom, and the upper absorbent layer includes a middle area and a Anti-side leakage areas on both lateral sides of the middle area, the middle area has several upper absorption sections distributed along the longitudinal direction, each of the upper absorption sections is arranged at intervals, and the distribution density of the superabsorbent resin on the anti-side leakage area is greater than The upper absorbing section, the lower absorbing layer is longitudinally distributed with several lower absorbing sections, each of the lower absorbing sections is arranged at intervals, and the layers of the composite core are bonded by degradable hot-melt adhesives. It solves the problem that the existing paper diapers are easy to agglomerate, break and delaminate, and the hot melt adhesive used for bonding has good bonding effect and is degradable.