Abstract: The breeding scale of livestock and poultry exhibits an obvious differentiation trend in China. From the perspective of scale, this paper makes use of the survey data of 754 pig farms in five provinces and employs the Logit model to analyze the factors influencing different scale farmers’ willingness to harmless disposal of the pollution from livestock and poultry. The results show that such factors as whether being a village leader, proportion of agricultural labor, proportion of pig raising income, training and government subsidies have significant positive effect on small scale farmers’ willingness to harmless disposal of the pollution; such factors as risk preference degrees, farm-land size, family savings, proportion of pig raising income, industrial organization, training and government subsidies have significant positive effect on middle scale farmers’ willingness to harmless disposal of the pollution; and such factors as education level, risk preference levels, industrial organization, proportion of pollution free pig breeding, cognition of pig quality regulations and government subsidies have significant positive effect on large scale farmers’ willingness to harmless disposal of the pollution from livestock and poultry.

Key words: different scale; pollution from livestock and poultry; willingness for harmless disposal; influencing factors