Dual-purpose channel facility for irrigation and drainage of farmland

The utility model discloses a farmland irrigation and drainage dual-purpose channel facility, belongs to the technical field of farmland irrigation, and aims to solve the problems that a channel does not have a function of draining water in a farmland and can only realize an irrigation function, and the drainage efficiency is low and crops are easily soaked in water and rotten due to a mode of pumping out the water in the farmland by adopting a water pump. A first diversion water channel and a second diversion water channel which are symmetrically distributed are connected to the two ends in the channel body in a penetrating mode, arc-shaped grooves are formed in the middle protruding positions of the first diversion water channel and the second diversion water channel correspondingly, rotating rods are rotationally connected between the top faces of the inner side walls of the arc-shaped grooves and the bottom face in the channel body, and diversion plates are fixed to the outer side walls of the rotating ro