The invention discloses special concrete for a water conservancy project. The special concrete is prepared from the following components in parts by weight: 66-76 parts of quick-hardening sulfoaluminate cement, 34-39 parts of ordinary Portland cement, 28-36 parts of coal ash, 18-22 parts of gypsum, 10-12 parts of calcium hydroxide, 1-1.5 parts of nano-silicon dioxide powder, 1-1.5 parts of nano-zinc oxide powder, 4-6 parts of short-cut glass fibers, 6-8 parts of chitin, 3-4 parts of ammonium citrate, 1-1.5 parts of sodium polystyrenesulfonate, 1.5-2 parts of sodium isopropylbenzenesulfonate, 3-4 parts of a polycarboxylate high-performance water reducer and 48-60 parts of water. According to the special concrete for the water conservancy project, the anti-penetrability performance is remarkably improved, the mass loss and relative dynamic elastic modulus loss of concrete in a freeze-thaw test are remarkably reduced, and the freeze-thaw damage resistance of the concrete is greatly improved. Therefore, the special concrete is very suitable for various water conservancy projects in regions with high diurnal temperature difference.