Rapid assembling structure for underwater pile foundation formwork

The utility model discloses an underwater pile foundation template rapid assembling structure which comprises a first single cylinder and a second single cylinder, and first grooves are formed in the upper end of the first single cylinder and the upper end of the second single cylinder at equal intervals in the circumferential direction. Second grooves are formed in the lower ends of the first single cylinder and the second single cylinder at equal intervals in the circumferential direction, the lower end of the first single cylinder is clamped into the upper end of the second single cylinder, integrated convex rings are arranged outside the circumferences of the lower ends of the first single cylinder and the second single cylinder, and a hoop is arranged outside the joint of the first single cylinder and the second single cylinder. When the device is used, an upper plug is formed between every two adjacent first grooves, a lower plug is formed between every two adjacent second grooves, the upper plugs are i