The utility model provides a load-bearing back float, and relates to the technical field of swimming training tools. The structure comprises a structure body, the structure body comprises a first
load bearing structure, or the structure body comprises the first
load bearing structure and a second
load bearing structure arranged in the first load bearing structure, the first load bearing structure is made of
silica gel materials, the density of the second load bearing structure is larger than that of the first load bearing structure, and the
buoyancy of the structure body in water is smaller than the gravity of the structure body. The
silica gel material enables a trainer to wear more comfortably during training, the
silica gel material is more attached to the body and does not interfere with the swimming motion of the trainer, safety can be ensured in the training process, the total weight of the load-bearing back float can be determined more accurately through use of the first load-bearing structure and the second load-bearing structure, and the training efficiency is improved. The load-bearing back float can enable the swimming advanced trainee to
resist the weight of the load-bearing back float through the own technology and comprehensive ability in a load-bearing mode, and the load-bearing back float is more suitable for professional swimming advanced trainees.