To identify the environmental risk including air，water and soil pollution risk of small holders inappropriate treatment to pigs manure，after the construction of index system by Analytic Hierarchy Process（AHP），the paper took the method of fuzzy DEMATEL and Projection Pursuit of the same 11 experts and experiments were conducted respectively in January，2016（ten months after“Water Ten Chapters”promulgation）and February，2017（nine months after“Soil Ten Chapters”promulgation）.The results showed that the weight of air pollution risk，water pollution risk，soil pollution risk in two judgments were 0.2424，0.3646，0.3930 and 0.2377，0.4485，0.3138.Experts reached the consensus that air pollution risk took up the smallest weight.But they had different opinions about water pollution risk weight and soil pollution risk weight due to the instant policy effect of“Water Ten Chapters”and“Soil Ten Chapters”.Several suggestions were given based on the results.