Shareholder　behavior　research　is　a　hot　topic　in　the　field　of　enterprises　management.　The　opposite-unity　relationship　of　controlling　and　minority　shareholders　provides　an　opportunity　for　the　application　of　the　symbiosis　theory　in　the　study　of　enterprises　finance.　Based　on　symbiotic　theory　and　the　quadratic　sum　model,　this　paper　studies　the　bifurcation　problems　of　equilibrium　points　of　the　listed　company　shareholders　benefit　symbiosis　models,　and　provides　symbiosis　status　and　strategy　among　shareholders　through　the　analysis　of　shareholders　benefit　contribution　parameters.