Construction method for roof sports ground

The invention discloses a construction method for a roof sports ground. According to the method, a building roof platform is utilized to build a sports ground, and then a sound insulation layer, a slope making layer, a leveling layer, a waterproof layer, a thermal insulation layer, an isolating layer, a protection layer, a first decoration layer and a second decoration layer are sequentially constructed on a building roof. The sports ground is built on the building roof platform, besides the waterproof layer coating the roof, the thermal insulation layer and the protection layer are arranged,and a cement self-leveling interlayer and a polyurethane surface layer are also additionally arranged, so that damage caused by light, heat and other environmental factors as well as physical damage such as external force are further avoided; and the service environment of the waterproof layer is improved, the service life of the waterproof layer is greatly prolonged, and the trouble of regularlyrepairing the roof waterpr