The invention discloses hydraulic solid structure high-performance concrete with the strength grade of C30-C40 and a construction method thereof. The invention belongs to the technical field of building construction. The construction method comprises the following steps of: forming a cementing material by using fly ash, slag powder and a high-performance water reducing agent, wherein the free falling height of the concrete is less than or equal to 1.0 m, the pouring speed is less than or equal to 50cm/h and the thickness of each layer is 30-50 cm, and when one green body layer is poured, compacting the concrete by using a medium-low frequency vibrator; plastering the top surface of the structure for at least two times, and carrying out secondary plastering and pressing before initial setting of concrete; during maintenance, firstly maintaining the concrete with a mold, and then removing the mold for moisturizing maintenance, wherein the curing time is 21-30 days in total, and the maintaining time with the mold is 12-21 days. According to the invention, the use amount of cement is obviously reduced, the compactness of concrete is improved, the hydration heat and temperature rise ofconcrete are reduced, and meanwhile, the effects of saving resources and protecting the environment are achieved.