Based on the questionnaire data 335 of farmers' participation in "clean countryside" action in the Dongting Lake district, this thesis analyzes the farmers' willingness and its effect factors to participate in agricultural non-point source pollution control. The empirical results show that the farmers' willingness to participate in agricultural non-point source pollution control is generally low. Factors such as awareness of "clean countryside", government propaganda and technical training have significant positive impact on farmer's pa...