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With the increasingly serious global environmental problems, the concept of sustainable development has gradually become an important topic in various industries. In the field of packaging, traditional packaging materials such as plastic, aluminum foil and non-degradable paper products are widely used, but these materials have caused great pressure on the environment in the process of manufacturing, using and discarding. Economic and efficient sustainable packaging bags came into being, which became an important means to solve the waste of resources, reduce carbon emissions and protect the ecosystem. Characteristics of Sustainable Packaging Bags Environmental protection of materials: Use degradable, recyclable or renewable materials to reduce the consumption of natural resources. Design simplification: optimize the packaging structure and reduce unnecessary packaging layers and complexity. Life cycle assessment: consider the whole life cycle of materials from production to recycling, and minimize resource waste and pollution discharge. Economical and efficient: reduce production, transportation and recycling costs while meeting functional requirements. Key Technical Path of Sustainable Packaging Bags Development and application of degradable materials. Biodegradable plastics: such as polylactic acid (PLA) and polyhydroxy fatty acid ester (PHA), which can be decomposed into water and carbon dioxide by microorganisms in the natural environment. Substitution of natural materials: sustainable packaging materials made of natural wastes such as bamboo fiber, rice husk and wheat straw have good biodegradability. Water-soluble materials: such as polyvinyl alcohol (PVA), which can be quickly dissolved in water and is non-toxic, are suitable for some special purpose packaging. Packaging design optimization Lightweight design: reduce the use of recyclable packaging materials , while ensuring the strength and function of packaging. Modular design: adopt common packaging parts to realize the reuse of packaging materials. Multifunctional design: combine the functions of packaging, storage and transportation to reduce the need for additional materials. Green production technology Energy-saving technology: Optimize the manufacturing process to reduce energy consumption and greenhouse gas emissions. Environmental protection coating: develop solvent-free and pollution-free surface coating to improve the functionality and durability of recyclable pouches . 3D printing technology: using digital manufacturing technology to realize on-demand production and reduce waste. Recycling and recycling of packaging waste Closed-loop recycling system: establish a recycling channel from consumers to manufacturers to convert waste packaging materials into raw materials for new products. Combination of mechanical recycling and chemical recycling: Mechanical recycling can treat simple wastes, while chemical recycling technology can decompose complex composite sustainable packaging materials and extract high-value monomer raw materials. Community participation recycling model: encourage consumers to participate in recycling through incentive mechanism to improve the recycling rate of waste. Economic and efficient sustainable packaging bags is an important way to solve resource waste and environmental pollution. Efforts in material research and development, design optimization, production process improvement and recycling make sustainable packaging bags gradually become an important trend in the global packaging industry. Despite the challenges of cost, technology and market acceptance, with the progress of technology and the support of policies, economic and efficient sustainable packaging bags will usher in a broader development space and make positive contributions to the realization of global sustainable development goals.