Recently in our country，the event of farmers throwing dead diseased pigs or dead diseased pigs illegally flowing to the market keep occurring that has increasingly threatened the protection of environment and put human health in danger. So，it is extremely urgent for governing the dead diseased pigs from the source. The research perspective of this paper is farmers’disposing behaviors of dead diseased pigs，assuming farmers alone with the logic thought of“cost-benefit”to deal with dead diseased pigs. On the basis of summarizing the existing research literature，this paper concludes several factors，such as the year of farming，farming scale，the cognition of relevant laws and regulations，pig disease and epidemic prevention and so on，proposing hypothesis that aforementioned factors can affect farmers’disposing behavior. By building behavior probability model，adopting computational simulation experiment method，this paper researches the relationship between the basic characteristics of pig farmers and their disposing behaviors of dead disease pigs. The results demonstrate that the relationship between the year of farming and farming scale and disposing behavior choice of dead disease pigs are not simply linear. However，it is a positive correlation between the cognition of government policy，relevant laws and regulation，pig disease and epidemic prevention and behavior choice of farmers. Comparing with government subsidy of harmless treatment，government supervision and penalties for regulating disposing behavior of dead disease pigs are more efficient. The meaning of this essay is to target the basic characteristic of farmers who are choosing negative behavior to deal with dead disease pigs，and to supply decision-making reference for government to manage the phenomena of dead disease pigs throwing and flowing into market from the source.