Farmland irrigation system for water conservancy project

The invention provides a water conservancy project farmland irrigation system, and relates to the technical field of farmland irrigation. The farmland irrigation system for the water conservancy project comprises a rainwater collecting tank and a farmland area, a cavity is formed in the rainwater collecting tank, a first motor is arranged in the rainwater collecting tank, the output end of the first motor is fixedly connected with a lead screw, the outer wall of the lead screw is in threaded connection with a moving block, and the outer surface of the moving block is fixedly connected with a connecting block; a scraper blade is fixedly connected to the outer surface of the connecting block, a dustproof net is fixedly connected to the position, located below the scraper blade, of the inner wall of the rainwater collecting groove, a bottom frame is arranged in the middle of the farmland area, a second motor is arranged on one side of the inner bottom wall of the bottom frame, and a rotating shaft is fixedly con