Abstract: Waste corrugated paper (WCP) was used as raw material, gelatin (G) and phytic acid (PA) were used as modifiers, and high energy absorption aerogel was prepared by sol-gel method. The effects of G dosage, PA dosage, and reaction temperature on the mechanical properties of dual-crosslinked modified waste paper-based aerogels were investigated. The structural and performance changes of aerogels before and after single modification with G and dual modification with G and PA were characterized by SEM, FTIR, XRD and TGA. The results show that the modified monomer is successfully crosslinked onto the waste paper fiber, and the double crosslinked waste paper based aerogel presents a three-dimensional network structure. Compared with the unmodified and single modified waste paper based aerogel, it has higher thermal stability, excellent thermal insulation (0.045 W·m⁻¹·K⁻¹) and super energy absorption (Absorption energy per unit volume is 253.45 kJ/m³ at 70% strain). The energy absorption capacity is 11.26 and 2.7 times higher than that of expanded polyethylene (EPE) and ethylene vinyl acetate (EVA), respectively. As a green cushioning material in the packaging and transportation process, it has broad application prospects.