Integrating multiple core physical advantages in one finished product, the composite panel features ultra-low self-weight, high structural rigidity and mechanical toughness, permanent anti-corrosion and anti-aging resistance, stable heat preservation and heat insulation efficiency, as well as excellent noise reduction and sound absorption buffering performance. It is widely adapted to diversified industrial and civil supporting scenarios, including RV integral car bodies and outer enclosure structures, constant-temperature refrigerated logistics cargo boxes and special transport vehicle compartment plates, fixed and mobile cold storage enclosure lining panels, rapid assembly modular integrated prefabricated houses, lightweight aerospace simulation cabin supporting structural parts, outdoor professional climbing wall base substrates, professional pickleball sports racket base plates, as well as intelligent electronic teaching whiteboard back support panels.