Ecological culture refers to a kind of culture mode in which different organisms grow together in the same environment, maintain ecological balance and improve culture efficiency through corresponding technology and management measures and using natural material circulation system in a certain culture space and area. This definition emphasizes that the foundation of ecological farming is based on the principle of symbiosis and complementarity between different cultured organisms; The condition of eco-agriculture is to use the natural material circulation system; The result is that different organisms can grow together in a certain culture space and area through corresponding technical and management measures, thus maintaining ecological balance and improving culture efficiency. Among them, several key words, such as the principle of symbiosis and complementarity, the natural material circulation system, and maintaining ecological balance, clarify several restrictive factors of ecological farming and distinguish the fundamental difference between ecological farming and artificial farming.