The present invention relates to the technical field of planting equipment, and discloses an irrigation device for uniform spraying and irrigation for grain planting, comprising a rotating disc, the inner cavity of the rotating disc is fixedly connected with a first bearing, and the interior of the first bearing is fixedly sleeved with a fixed column. The bottom of the fixed column is fixedly connected with the base, the top of the fixed column is fixedly connected with the first gear, the top of the rotating disc is fixedly connected with the fixed plate through the fixed block, the top of the fixed plate is fixedly connected with the hydraulic turbine, and the outer end of the output shaft of the hydraulic turbine A movable column is fixedly connected, and the end of the movable column away from the output shaft of the hydraulic turbine is fixedly connected with a second gear, and the outer wall of the second gear meshes with the first gear. The uniform sprinkler irrigation device for grain planting, through the cooperation among the rotating disc, fixed column, base, first gear, hydraulic turbine, movable column and second gear, ensures that the sprinkler head can perform uniform spray irrigation on the inside of the plantation, improving The rate at which grain grows within a plantation.