Ecological water-saving farmland water conservancy irrigation system

The invention relates to the technical field of farmland irrigation, and discloses an ecological water-saving farmland water conservancy irrigation system which is arranged on a ridge, is used for irrigating a farmland and comprises a flow divider and a supporting assembly installed on the outer side of the flow divider. The flow divider is of a cylindrical structure, a plurality of water outlet holes are distributed in the side face of the flow divider in the circumferential direction, and a connecting pipe is installed at the bottom of the flow divider and used for inputting water. The supporting assembly comprises two rectangular frames arranged in parallel, each rectangular frame is formed by connecting two vertical supporting rods and two transverse supporting rods end to end, the vertical supporting rods are used for being longitudinally and slidably connected with a shell of the flow divider, and elastic supporting mechanisms are further arranged between the vertical supporting rods and the shell of th