Fish hooks are mainly divided into the following categories: 1. Sleeve hooks. This kind of hook has sharp hooks, moderate opening of the hook door and long hook handle. The bait is easy to swallow, the barbed fish is quick, and the fish unloading is convenient. 2. Marushi. The hook tip faces inward and the ditch bottom is relatively round. It is also called snakehead hook. The slender configuration is easy to hang bait, convenient for the entrance of fish with small mouth shape, and difficult to unhook. Suitable for small and medium-sized fish. 3. New Guandong Hook. The hook is sharp and concave, the hook door is wide, and the hook body is thick. 4. Izu. Its hook type is small, and the length of the hook door, hook bar and hook handle is moderate, so many anglers call Izu the universal hook. The hook tip is inclined outwards by about 5 degrees, so the hook rate is high, but it is also easy to hang debris, which is not suitable for use in ponds with many aquatic plants. 5. Ishni. The hook tip bends inward, the hook door is wider, and the hook body is thicker. It is rarely unhooked after being caught. It is widely used. It is very suitable for bottom fishing. It is not only suitable for hand rods, but also widely used for explosive hooks and string hooks. 6. Xiaoji. This is the thickest type of freshwater fishing at present, with larger hooks and thicker hooks than Isini. It is mainly used for fishing large and medium-sized fish. 7. Thousand type fishhook. This kind of hook has a large configuration, the hook tip bends inward, the hook bar is moderate, the hook bottom is wide, and the hook door is narrow. It is very suitable for rubbing the bait to catch the bottom, and it is not easy to run fish after the end.