Abstract: On the basis of on-the-spot investigation, this paper analyzes the different scale pig-breeding cost-benefit in Yunnan province firstly, it is concluded that medium-sized pig breeding has higher yield and lower cost. And then in order to know the different scale pig-breeding cost control situation, it calculates the different scale pig-breeding break-even point. Finally, according to the conclusion that the medium scale pig-breeding is the moderate scale and the different scale pig-breeding break-even point policy, suggestions are put forward. Those suggestions provide the basis for pig breeding cost control, and provide decision-making reference for how to improve the efficiency of breeding pigs.