Preparation method of environment-friendly food packaging film

The invention discloses a preparation method of environment-friendly food packaging film. The method comprises the following steps that 1, hydroxyapatite, modified attapulgite, zinc oxide and titaniumdioxide are mixed, dried, crushed, and screened, starch and water are added, heating and stirring are conducted, and then the temperature is elevated when stirring is continued, so that a mixture A is obtained; 2, a polylactic acid-polycaprolactone copolymer, polyvinyl alcohol, glycerin, sorbitol and pentaerythritol are mixed, heated and stirred, the mixture A, methylcellulose, oleic acid, alginate and a stabilizer are added, the temperature is elevated, and stirring is conducted to obtain a mixture B; 3, the mixture B is subjected to hot-melt extrusion blow molding to form film, and finally,qualitative rolling and packaging are conducted to obtain the environment-friendly food packaging film. The packaging film prepared through the preparation method can be easily subjected to biodegradation, and has good mechan