Abstract: At present, the way of free-range in pigs' breeding is predominant in yunnan rural areas. However, the scale level is the essential tendency in the pigs' breeding industry. Costs control has become a stumble in the process of small and medium scale level breeding. This essay will analyze the main cost elements based on the standardized pigs farming. By comparing the differences between different pigs' breeding scales, it finds out different cost elements that affect the profits in the breeding process, and gives the farmers suggests on how to control the expenses.