Irrigation drain pipe for farmland

The utility model relates to the technical field of agricultural equipment, and discloses a farmland irrigation drain pipe which comprises a drain pipe body, a plurality of groups of water outlet holes are formed in the side wall of the drain pipe body, the distribution direction of each group of water outlet holes is parallel to the circumferential direction of the drain pipe body, and each group of water outlet holes comprises a plurality of water outlet holes; an adjusting assembly used for opening and closing the water outlet holes is arranged on the side wall of the drainage pipe body and comprises two adjusting rings oppositely arranged on the outer side wall of the drainage pipe body, a plurality of adjusting plates rotationally arranged between the adjusting rings and a clamping mechanism used for detachably connecting the adjusting plates and the drainage pipe body. The adjusting plate is used for opening and closing each group of water outlet holes. The irrigation mode of the irrigation drainage pip