A full-biodegradable mulching film for peanut planting comprises a heat-resistant layer, a
barrier layer and a
hydrolysis-resistant layer, wherein the heat-resistant layer is prepared from the following
raw material components: 70-90 parts of PBAT, 0-20 parts of PBS, 0-5 parts of PLA, 0-20 parts of an
inorganic filler, 0.1-2 parts of a chain
extender, 0.3-4 parts of a light stabilizer, 0.1-0.5 part of an
antioxidant and 0.1-0.5 part of a slipping agent; the
barrier layer is prepared from the following
raw material components: 40-70 parts of PBAT, 0-30 parts of modified PPC, 3-10 parts of PLA, 5-30 parts of the
inorganic filler, 0.3-2 parts of the chain
extender, 0.2-3 parts of the light stabilizer, 0.1-0.5 part of the
antioxidant, 0.1-2 parts of an anti-blocking agent and 0.2-3 parts of the slipping agent; and the
hydrolysis-resistant layer is prepared from the following
raw material components: 75-94 parts of PBAT, 0-10 parts of PLA, 0-5 parts of the
inorganic filler, 0.5-3 parts of the chain
extender, 0.1-0.8 part of the light stabilizer, 0.1-0.5 part of the
antioxidant and 0.2-3 parts of a
hydrolysis-resistant agent. The full-biodegradable mulching film is prepared by a three-layer co-
extrusion method, so that the defect that the requirements of all
layers cannot be simultaneously met in a single-layer film blowing production process is overcome.