This composite bag integrates high-quality substrates such as aluminum film/foil, nylon (NY) and polyester (PET), and is accurately matched through multi-layer compositetechnology.  It can be flexibly combined into various structures such as OPP+aluminum film/foil+PE, nylon+polyester+PE, specially designed for chemical fertilizers and various agricultural material packaging. Relying on the performance complementarity of different materials, it breaks the limitations of a single material, has multiple advantages such as barrier, load-bearing and corrosion resistance, and is produced in strict accordance with national solid chemical fertilizer packaging specifications, adapting to the full-scene agricultural material storage and transportation needs.