In order to ensure fresh taste, nuts are baked at low temperature; walnuts are peeled and used now; multiple composite preservation technologies such as high barrier packaging material + nitrogen filling + oxygen getter + desiccant are used; nut storage has won the second prize of national science and technology. It has obtained 1 invention, 1 utility model patent and accepted 5 technical patents. In addition, one group standard is being issued and one industry standard is being developed.