The invention relates to a transferring device, in particular to a flood flowing direction transferring device for irrigation and water conservancy. According to the technical aim to be achieved, flood or mass-flow water can be transferred and drained without being drained into farmland to inundate rice, and rice growth is benefited. According to the technical scheme, the flood flowing direction transferring device for irrigation and water conservancy comprises a cross rod, a supporting rod, a semi-arc-shaped pipeline, a protruding block, a drainage pipe and the like; the drainage pipe is mounted at the left end of the cross rod, a water supply pipe is mounted at the right end of the cross rod, the supporting rod is mounted in the middle of the top of the cross rod, and the semi-arc-shapedpipeline is rotationally mounted at the top end of the supporting rod. By means of a supporting device, the semi-arc-shaped pipeline can be supported, when a large amount of water is needed in farmland, the water is drained into the farmland, and the effects of being capable of transferring and draining the flood or the mass-flow water without draining the flood or the mass-flow water into the farmland to inundate the rice and not influencing rice growth are achieved.