The invention provides a method for culturing italian ryegrass, and belongs to the technical field of plantation, and especially relates to a culture technique for ryegrass. The invention provides the method for culturing italian ryegrass, and the method is easy in planting, convenient in management, high in yield, and easy in harvesting. The method for culturing italian ryegrass is characterized by comprising the following steps: 1, in sowing time, italian ryegrass Hercules can be sown in spring and autumn, combining with rain or irrigation, sowing after rain can easily obtain full stand; 2, seeding rate of the italian ryegrass Hercules being related to local natural conditions, soil conditions, sowing methods, and utilization objectives; 3, sowing method including: (1) sowing in drill, specification being 15-30 cm of line spacing and 5-10 cm of sowing width, (2) performing broadcast sowing, broadcast sowing being a most commonly used simple sowing method for farmers; 4, irrigating and draining, the italian ryegrass Hercules preferring wet and cannot stand waterlogging; 5, applying fertilizer, according to seedling conditions, and dressing a nitrogenous fertilizer once respectively in a trefoil stage and a tillering stage after seedlings emerge.