Leek is not only loved by people, but also the favorite bait for fish, mainly herbivorous fish and some omnivorous fish. It can be used as bait from spring to autumn. The method is to pick a long and thin young leaf, roll it up at a distance of about 1 cm to form a oblate sphere, pierce it with a hook tip to prevent it from loosening and unhooking, and then throw it into the water. Leek leaf rolls are semi-submerged and semi-floating in the water, and bream, grass carp, crucian carp and herring at the bottom will compete for food. The fishing practice of fishermen in various countries proves that the hotter the weather, the higher the hook rate of leek leaves, and the hook rate in sunny days is higher than that in rainy days. This is probably because leeks can cure acute gastroenteritis. The hotter the weather, the easier it is for fish to get this disease.

Practice has also proved that leek leaf hook is only suitable for floating fishing, hanging fishing and dragging fishing, but not for bottom fishing. The iron sheet next to the hook was heavier, and the bait sank to the bottom of the water, but no fish came to visit.