With the increasing diversification of food production technology, food safety is not only limited to the quality of food itself, but also whether the materials directly or indirectly contact with food are safe. These materials include food containers, packaging materials, food kitchenware, etc., which are collectively referred to as food contact materials. Food safety problems caused by them are also paid more and more attention by all walks of life. The world, especially the European Union countries and the United States, have made very strict regulations on food contact materials. Products exported to the EU and the United States must pass the corresponding test certification and obtain qualified product test reports, also known as "food grade testing". China also has strict hygiene requirements for different food contact materials. Therefore, whether it is exported or sold in China, it must pass the strict quality inspection of the country.