Abstract: The invention discloses a fitness barbell comprising a holding rod and a gravity body, the gravity body is a ring-shaped gravity fitness ring, a handle arranged in the diameter direction of the ring-shaped gravity fitness ring is arranged in the ring-shaped gravity fitness ring, the holding rod is fastened detachably with the ring-shaped gravity fitness ring through a connecting mechanism composed of a fixing seat and a fastening lock, and the ring-shaped gravity fitness ring is limited between the fixing seat and the lock body of the fastening lock through the lock tongue of the fastening lock. The invention has the following advantages: through the adoption of the ring-shaped gravity fitness ring as the gravity body, multiple purposes can be achieved, and materials are saved; and due to the application of the fastening lock, the gravity body is convenient to mount and detach, and the fastening effect is better.