Modern floating box health care method refers to putting people into a big box, which is filled with high-concentration salt water at 37℃ and painted black all around, so that people can float on the water and float freely with the waves to achieve the purpose of fitness. The body loses weight due to the buoyancy of water in high concentration salt water, and the whole body floats, so that muscles and joints can be fully relaxed and stretched, thus eliminating the fatigue of the body; It is dark around, everything is quiet, and the brain and nerves can get unprecedented relief and relaxation, rest and adjust in silence; In the buoyancy tank, the human body moves freely, and the metabolism slows down, so that the heart, blood vessels, gastrointestinal tissues and other tissues have the opportunity to rest and "recharge", which is conducive to the recovery of functions, thus contributing to physical and mental health.