This document specifies the requirements, test methods, inspection rules, packaging, transportation and storage of polyethylene soluble thermal insulation packaging bags (hereinafter referred to as "products"). This document is applicable to bag making processes using polyethylene as the matrix, composite powder as the thermal insulation additive, polyvinyl alcohol-modified sodium alginate composite as the performance enhancer and biodegradant, heat sealing or adhesion of packaging bags. Processed packaging bags.