The utility model discloses an effectively avoid an anti lodging device for grass family plant of grass family plant lodging. This anti lodging device, including first support column, second support column, first support column comprises first inner tube and first outer tube, is fixed with stranded wire coil on the first outer tube, the last winding of stranded wire coil has single rope, the second support column comprises second inner tube and second outer tube, overlaps on the second outer tube to be equipped with the sleeve, be provided with on the sleeve and be used for fixed the 3rd fixing device together of sleeve and second outer tube, when using, first support column, second support column set up respectively at the both ends in field, and the one end of single rope is passed through detachable construction and is fixed on the sleeve, include still that a plurality of U -shapeds prevent lodging device and a plurality of grades of poles, and the device can effectively avoid the lodging of grass family plant, guarantees the seed output of grass family plant, and in addition, the grass family plant of non -lodging does benefit to mechanized reaping. It popularizes and applies to be fit for planting technical field at plant species.