With the continuous improvement of people's living standards and national fitness, whether the gym is tall or not has become an essential hardware facility. If the swimming pool in the gym is equipped with underwater fitness, it is undoubtedly a landscape. Fitness in water can make full use of the characteristics of water resistance and buoyancy. Water aerobics exercises people's strength and endurance through the resistance of water, and shapes a perfect figure. Through the buoyancy of water, water aerobics can exercise the flexibility of human body and reduce sports injuries. The assembled swimming pool of gymnasium customized by the water conservancy party has long service life, quick installation, easy error-making, easy cleaning and care, and adapts to the difficult environment of planting. It is the first choice for the gym swimming pool.