Production process of environment-friendly biological oxidation degradable preservative film

The invention relates to the field of degradable preservative films, in particular to a production process of an environment-friendly biological oxidation degradable preservative film. The environment-friendly biological oxidation degradable preservative film is prepared from the following components in parts by mass: 40 to 60 parts of modified sodium alginate and 30 to 50 parts of modified polylactic acid. The modified sodium alginate is prepared by blending modified polyvinyl alcohol and sodium alginate and then crosslinking with Ca < 2 + >, and the modified polylactic acid is prepared by mixing and extruding polylactic acid, modified ammonium polyphosphate and PBAT. The sodium alginate and the polylactic acid are modified, so that the prepared preservative film is integrally soft and high in plasticity and has good mechanical properties and heat resistance. The modified polyvinyl alcohol is obtained by grafting tea polyphenol and polyvinyl alcohol, and the tea polyphenol is a fresh-keeping and bacteriostat