first, the four grades of food are organic food, green food, pollution-free food and ordinary food. The first three grades need to be certified, and the packaging has certification marks, but ordinary food has no marks on it. Among them, the highest end belongs to organic food.

second, green food: green food refers to food that is safe, high-quality and nutritious without pollution and pollution, and has been recognized by specialized agencies and allowed to use the green food mark. Green food should not only meet the nutrition and hygiene standards of general food stipulated by the state, but also meet the following standards:

(1) The origin of the main raw materials of the product has been verified by the environmental protection supervision department designated by the Ministry of Agriculture to have a good ecological environment and meet the ecological standards of green food.

(2) The production operation procedures of raw materials crops meet the pollution-free control standards of green food.

(3) The production, packaging, storage and transportation of processed foods meet the requirements of the Food Hygiene Law of the People's Republic of China, and the final products are qualified by the food inspection department designated by the Ministry of Agriculture according to the monitoring items of relevant national food hygiene standards.

(4) The outer packaging of products must conform to the general national food labeling standards and the specific packaging and labeling regulations for green food. According to "Operating Rules for Green Food Production", green food is divided into AA grade and A grade.

Legal basis:

Article 2 of the Food Safety Law of the People's Republic of China, this Law shall be observed when engaging in the following activities within the territory of the People's Republic of China:

(1) Food production and processing (hereinafter referred to as food production), food sales and catering services (hereinafter referred to as food business);

(2) production and operation of food additives;

(3) the production and operation of packaging materials, containers, detergents and disinfectants used for food and tools and equipment used for food production and operation (hereinafter referred to as food-related products);

(4) food producers and operators use food additives and food-related products;

(5) storage and transportation of food;

(6) Safety management of food, food additives and food-related products.

the quality and safety management of edible primary products (hereinafter referred to as edible agricultural products) shall comply with the provisions of the Law of the People's Republic of China on the Quality and Safety of Agricultural Products. However, the marketing of edible agricultural products, the formulation of relevant quality and safety standards, the publication of relevant safety information and the provisions of this law on agricultural inputs shall abide by the provisions of this law.

Derivative question:

What are the criteria for judging green food?

the criteria for judging green food is a technical document which is formulated by applying the principles of science and technology, combining with the production practice of green food and drawing lessons from relevant standards at home and abroad, and must be followed in the production of green food and based on the quality certification of green food. Green food standards are issued by the Ministry of Agriculture, and green food production enterprises must comply with the mandatory national industry standards. Green food standards are divided into two technical levels, namely AA-level green food standards and A-level green food standards. AA-level green food standard requires that the environmental quality of the production place conforms to the Environmental Quality Standard of Green Food Origin. In the production process, chemically synthesized pesticides, fertilizers, food additives, feed additives, veterinary drugs and means of production harmful to the environment and human health are not used, but technologies such as using organic fertilizers, planting green manure, crop rotation, biology or physics are used to enrich the soil, control diseases, pests and weeds, protect or improve the product quality, so as to ensure that the product quality conforms to the green food product standard. A-grade green food standard requires that the environmental quality of the place of production meets the Environmental Quality Standard for the Origin of Green Food. In the production process, limited chemical synthesis means of production are used in strict accordance with the requirements of the guidelines for the use of green food means of production and production operation procedures, and biological technology and physics are actively adopted to ensure the product quality meets the requirements of green food product standards.