Abstract: Taken the economic man hypothesis, a most basic hypothesis in the western economic, as the research beginning, based on a new theory hypothesis, produces the generalized economic analysis to the farmer specialized cooperation behavior, and unifies the new research conclusion to elaborate its policy meaning. The objective economic base of the cooperation behavior is economic man's economical benefit circumference scope unceasingly expands down to mutually overlaps.An important premise to the specialized cooperation behavior of peasant is that the family management with land contract fulls development, and throughout takes this as foundation.The economic efficiency of specialized cooperation originates from the cooperation income, and the cooperate income should be more than the cooperation cost.The net income of cooperative behavior must preserve to its interior.The reasonable and balanced benefit feedback mechanism is the key to its continue working.