Green food does not mean "green" food, but refers to pollution-free safe, high-quality and nutritious food. Natural resources and ecological environment are the basic conditions for grain production. Because things related to life, resources and environment are usually labeled as "green", in order to highlight that these foods come from a good ecological environment and can bring great vitality to people, they are named "green food". Green food must meet the following conditions at the same time: 1, and the origin of products or raw materials must meet the eco-environmental quality standards of green food. 2, crop planting, livestock and poultry breeding, aquaculture and food processing must comply with the operating rules of green food production; 3, the product must meet the quality and hygiene standards of green food; 4. The outer packaging of products must conform to the national general food labeling standards and the specific packaging, decoration and labeling regulations of green food. Strictly speaking, green food is a kind of pollution-free, safe, high-quality and nutritious food that follows the principle of sustainable development, is produced according to a specific mode of production, and is approved by specialized agencies to use the green food logo trademark. The development of green food starts with protecting and improving the ecological environment, takes the development of pollution-free food as a breakthrough, closely combines environmental protection, economic development and improving people's health level, and promotes a virtuous circle of environmental, resource, economic and social development. The specific production mode of green food refers to the production and processing according to standards; Implement the whole process quality control of products; Implement mark management for products according to law. Pollution-free, safe, high-quality and nutritious are the characteristics of green food. Pollution-free means to prevent pesticide residues, radioactive substances, heavy metals and harmful bacteria from polluting all aspects of food production and ensure the cleanliness of green food products through strict monitoring and control during the production and processing of green food. The high quality characteristics of green food include not only the high level of external packaging, but also the high level of internal quality; The internal quality of products includes two aspects: one is excellent internal quality, and the other is high nutritional value and health and safety indicators. In order to ensure that green food products are pollution-free, safe, high-quality and nutritious, there is a relatively complete quality standard system for developing green food. Green food standards include environmental quality standards of origin, production technology standards, product quality and hygiene standards, packaging standards, storage and transportation standards and other related standards, which constitute a complete quality control standard system of green food. In order to distinguish ordinary food, green food is marked with unified signs. Green food signs are represented by specific graphics. The sign of green food consists of three parts: the sun above, the leaves and buds below. The logo graphic is a right circle, indicating protection and safety. The whole character depicts a harmonious vitality in the bright sunshine, telling people that green food is a safe and pollution-free food from a pure and good ecological environment, which can bring people great vitality. Green food signs also remind people to protect the environment and prevent pollution, and create new natural harmony by improving the relationship between people and the environment. The means of green food label management include technical means and legal means. Technical means refers to the certification of the origin environment, production technology and product quality of green food according to the green food standard system, and only enterprises and products that meet the green food standard can use the green food logo trademark. Legal means refers to the implementation of trademark management for enterprises and products that use green food marks. The logo trademark of green food has been registered by China Green Food Development Center in the State Administration for Industry and Commerce, and the exclusive right is protected by the Trademark Law of People's Republic of China (PRC).