本发明提供一种农田水渠防汛机构，包括，水渠主体；侧板，所述侧板倾斜安装在所述水渠主体内部两侧，且多块所述侧板沿水渠主体长度方向上并排且侧壁贴合布置；挡板，所述挡板底端通过铰链转动安装在所述侧板倾斜面的上端，多块所述挡板沿侧板长度方向上并排且侧壁贴合布置；牵引部，所述牵引部包括配重块和第一牵引绳。定位部，所述定位部包括定位件和第二牵引绳，所述定位件一端与配重块活动安装并支撑配重块悬空，定位件另一端贯穿侧板并与挡板前部相连接；第一浮块，所述第一浮块固定安装在挡板顶端。该农田水渠防汛机构，能够在汛期水渠涨水时自动抬起，平常时期浮于水渠中，汛期响应速度快，同时造价低，适合大面积铺设。

The invention provides a farmland canal flood prevention mechanism which comprises a canal body. The side plates are obliquely installed on the two sides of the interior of the canal body, the multiple side plates are arranged side by side in the length direction of the canal body, and the side walls of the side plates are attached to each other; the bottom ends of the baffles are rotationally installed at the upper ends of the inclined faces of the side plates through hinges, the multiple baffles are arranged side by side in the length direction of the side plates, and the side walls of the baffles are attached; and the traction part comprises a balancing weight and a first traction rope. The positioning part comprises a positioning part body and a second traction rope, one end of the positioning part body is movably installed on the balancing weight and supports the balancing weight to be suspended, and the other end of the positioning part body penetrates through the side plate and is connected with the front portion of the baffle; and the first floating block is fixedly mounted at the top end of the baffle. The farmland water channel flood prevention mechanism can be automatically lifted when water in the water channel rises in the flood season, floats in the water channel at ordinary times, and is high in response speed in the flood season, low in manufacturing cost and suitable for large-area laying.