Degradable mulching film and preparation method thereof

The invention relates to the technical field of mulching films, in particular to a degradable mulching film, which is prepared from 50 to 60 parts of polyvinyl alcohol, 10 to 25 parts of carboxymethyl cellulose, 2 to 4 parts of silicon dioxide micro powder, 0.1 to 0.2 part of ethyl p-hydroxybenzoate, 0.2 to 0.8 part of sodium salicylate and 0.1 to 0.2 part of auxiliaries. The degradable mulching film is prepared by preparing a glue solution with pure water, and performing electric shock on the uncured casting material layer on the roller by utilizing high voltage during casting. According to the invention, through material combination, the performance of the mulching film, including tensile strength, ultraviolet resistance and the like, is enhanced, and through a high-voltage electric shock preparation mode, an uncured casting material layer is subjected to electric shock, so that not only is the hydrolysis temperature of the mulching film improved, but also the loosening degree between molecular layers can b