Abstract:To explore symbiotic behavioral patterns of farmer and dominant enterprise, as well as the dynamic evolution mechanism of different symbiotic behavior patterns, this paper uses the ecological theory and the symbiosis theory, build Logistic model to explore the different symbiosis behavior modes between farmer and dominant enterprise. And also uses the phase plane method to analyze the dynamic evolution process of different symbiotic models. The results of research are as following: First, there are six symbiosis behavior modes between farmer and dominant enterprise. But the dominant modes are parasitic symbiosis, competitive symbiosis, independent symbiosis and reciprocal symbiosis respectively. Second, amensalism symbiosis and commensalism symbiosis are the transition modes when farmer and dominant enterprise from competitive symbiosis to independent symbiosis or from independent symbiosis to amensalism symbiosis. Third, the niche overlap and block coefficient determines the direction of evolution. When niche overlap is greater than the block coefficient, both sides will evolve into amensalism symbiosis. Conversely, both sides will evolve into parasitic symbiosis.