Abstract:Based on the development pattern of modern agriculture in China, referring to relevant research conclusions from home and abroad, the cause and characteristic of modern agricultural non-point source pollution are analyzed. From the angles of “controlling at source, intercepting at process, disposing at end, recycling for irrigation, partition management”, the construction method of modern agricultural irrigation reduction model(MARIM)is proposed. Moreover, an engineering example of Dongdawei modern agricultural demonstration zone around Chaohu Lake is observed to validating the system. The results indicate that the content of TN and TP in the tail water near top, middle and bottom of the dam is reduced by 88. 2%, 89. 6%, 80. 6% and 88. 2%, 88. 4%, 82. 6%, respectively, which is highly efficient in controlling modern agricultural non-point source pollution and reusing agriculture tail water.