The invention discloses a fishhook for fishing, in particular to a retractable and expandable explosion fishhook. The explosion fishhook mainly comprises the following accessories: an outer hook 1, a fixed disk 3, a support 4, a rivet 5, an irony tubular hook taking utensil 6, a main post 7, a spring 8, a permanent magnet 9, a hook taking-up wire 12 and the like. The irony tubular hook taking utensil 6 and the permanent magnet 9 attract each other when the explosion fishhook is furled, which can compress the spring 8 to a retracted state, and at the same time, the explosion fishhook is in a furled state. When a fish bites the explosion fishhook and slightly pulls the outer hook 1, the irony tubular hook taking utensil 6 and the permanent magnet 9 separate, and at the same time, the spring 8 flicks and the fishhook blows up. The fishhook hooks the mouth of the fish from several directions, and thus, the hook can not be spit anyhow. The goal of improving fish-catching rate and more easily fishing can be achieved. The explosion fishhook can be expanded after being bit by the fish, which causes that the hook can not be spit after being bit by the fish, and therefore, the fish-catching rate of fishing can be greatly improved. The explosion fishhook belongs to a fishing gear.