Abstract: Taking Tianrun Dairy industry as the base point of enterprise strategy analysis,this paper mainly analyzed the dynamic competition and cooperative relationship between Tianrun Dairy and six kinds of market interest subjects,namely its suppliers,buyers,substitutes,complementary products,same industry manufacturers and potential entrants,using the six-force interaction model.Based on the realistic basis of competition,cooperation and symbiosis,this paper analyzed the preconditions of competition and cooperation between Tianrun Dairy industry and six kinds of market interest subjects and their mutual conversion relations.In order to further explore the road of sustainable development,this paper put forward some suggestions to change the mindset,adhere to the differentiation strategy and optimize the product structure.

Key words: dynamic competition, competition-cooperation relationship, Tianrun Dairy industry, six forces interaction, multi-win development