(1) The length of the pool is generally 50m, and the allowable error is+0.03m. At the end of the pool, an electric shock board timer can be installed (the size of the electric shock board is 2.4m×0.9m×0.0 1m, which is placed 30cm above the water surface of the pool walls at both ends. Immerse in water for 60 cm. The surface of the plate is brightly colored and marked with the same markings as the pool wall. ) The total length of the pond is 50m, the length of the short pond is 25m, the total length of the short pond is 25m, and the allowable error is+0.02m. (2) The width of the pond is 2 1m, which is 25m for the Olympic World Championships. (3) The water depth shall be ≥ 1.8m ... The walls at both ends shall be 30cm above the water surface and 80cm below the water surface. A rest platform can be set up within the range of 1.2cm from the water surface on the pond wall, and the width of the table top is 10~ 15cm. (4) The width of each lane in the competition is 2.5m, and the side lanes are added with 0.5m.. There is a lane separation line between the two lanes, which is hung on both ends of the pool wall with buoy lines. There are hooks in the pool wall, and the center line of the pool bottom and the pool bottom wall should be set as dark markings. (5) The departure platform should be centered on the center line of each lane, and the mesa should be 50cm×50cm. The front edge of the landing surface should be 50 ~ 70cm higher than the water surface. The inclination of the table top and the water surface shall not exceed 10 ",and athletes should grab the table top at the front and both sides when starting. The starting platform should be equipped with a handshaker for backstroke, which is 30 ~ 60 cm away from the water surface. There are two types: horizontal and vertical. There should be numbers indicating the number of lanes around the departure platform, arranged from right to left according to the departure direction. (6) The swimming pool needs to install overflow troughs on both sides of the wall to keep the requirements of the pool water and try to discharge the floating dirt on the surface. Swimming pool ladders should be embedded in the pool, the number is generally 4~6, and their positions should not affect the referee's work. (7) The wall of the pool must be vertical and flat, the bottom of the pool should be non-slip, and the pool surface should be flat and easy to clean. Generally, white mosaics are pasted on the wall of the pool, white glazed tiles are pasted on the bottom of the pool, and the lane markings are black glazed tiles. (8) Generally, the width of the swimming pool shore is more than 5m at the departure platform end, and that of other swimming pools is more than 3m. For the official competition pool, the bank width of the starting platform pool is ≥ 10m, and other bank widths are ≥5m.