[Purpose/Meaning] In view of the phenomenon of "small county and big ecology" existing in the development of county electricity at present, this paper explores the subject, content and symbiotic interest characteristics of symbiotic interest of electricity supplier in county area, and analyzes the types and benefits of symbiosis and the relationship between the durability and stability issues, to promote the continuity and stability of the symbiotic benefits of electricity suppliers in the county, provide a theoretical basis for the healthy development of county e-commerce ecosystem and broaden the scope of application of information ecology theory. [Method/process] Based on the theory of ecological information, this paper explored the forming conditions of the symbiotic benefits and the contents and characteristics of the symbiotic benefits of the electricity supplier in the county. On this basis, it explored the interrelationship between the symbiosis of interest entities and the stakeholders, interest stability and persistence were studied. [Result/Conclusion] The interests of the county electricity suppliers from the angle of interests include the profit-sharing symbiosis, the symbiotic harm to mutual benefit, mutual benefit symbiosis, mutual harm symbiosis four kinds of interests. This paper argues that the symbiotic symbiosis among these relations is one of the most persistent and stable types of relationships and one that we should pursue.