The medical health services assume the moral duty and have the requirement of seeking the benefit at the condition of market economy. The action of benefiting others at the medical market includes benefiting for others unselfish and benefiting for others for self.To one medical action,be it must benefit for others unselfish or benefit for others for self? It is important to analyze the benefit limit.We must grasp three principles of benefit for every patient,benefit mutual and benefit independent decisions when we analyze the benefit limit.