Degradable mulching film capable of improving water resistance, heat preservation, soil moisture conservation and mechanical properties through lamination compounding and preparation method of degradable mulching film

The invention provides a degradable mulching film capable of improving water resistance, heat preservation, soil moisture conservation and mechanical properties through lamination and compounding and a preparation method of the degradable mulching film. The degradable mulching film capable of improving the water resistance, heat preservation, soil moisture conservation and mechanical properties is prepared from a mechanical supporting material, a water blocking material and a functional material through a micro-nano lamination co-extrusion film blowing technology; the preparation method of the degradable mulching film capable of improving the water resistance, heat preservation, soil moisture conservation and mechanical properties comprises the steps of material vacuum drying, material plasticizing extrusion, layer number multiplication, enveloping and ring forming, blowing forming, air ring cooling, traction roller traction and film rolling. The micro-nano laminated film is a film material formed by alternat