Preparation method of recyclable EVA/PVA (Ethylene Vinyl Acetate/Polyvinyl Acetate) foaming material and foaming material

The invention provides a preparation method of a recyclable EVA/PVA (Ethylene Vinyl Acetate/Polyvinyl Acetate) foaming material, which comprises the following steps: respectively adding PVA with alcoholysis degree of 30-88% and EVA with vinyl acetate content of 5-60% into a torque rheometer, and then carrying out first blending treatment; respectively adding a catalyst and a cross-linking agent into the torque rheometer, and then carrying out blending treatment for the second time; respectively adding a foaming agent, a filling agent and an active agent into the torque rheometer, and then carrying out blending treatment for the third time to obtain a standby material; the standby material is subjected to mold pressing foaming forming, and the EVA/PVA foaming material is obtained. A mechanical blending method is adopted, EVA is matched with a low-alcoholysis-degree PVA sizing material, ester exchange reaction is utilized under the action of a catalyst, the EVA foaming material with dynamic crosslinking bonding