Swimming assistive device

The utility model relates to a swimming assistive device which is characterized by consisting of two independent arch-shaped floatable materials, wherein two lower parts of the first floatable material are connected with the two upper parts of the second floatable material; a connecting part is arranged in the middle of the first floatable material to tighten the side parts of the first floatable material; and bonding parts for bonding with legs of a user are respectively arranged on two sides of the lower parts of the second floatable material. According to the utility model, with the first and second floatable materials, the assistive device more fits with the human body curvature; compared with a traditional swimming assistive device, the assistive device provided by the utility model acts on the hip and leg parts simultaneously to generate buoyancy, and keeps buoyancy balance together with the upper body, so as to save physical effort of a swimmer and improve swimming efficiency; and a user can enjoy more convenient and flexible swimming, and accordingly, a swimming beginner can master swimming quickly.