High-strength wet-spraying concrete and preparation method thereof

The invention relates to the technical field of concrete, and particularly discloses high-strength wet-spraying concrete and a preparation method thereof, the high-strength wet-spraying concrete comprises the following raw materials by weight: 300-500 parts of cement, 50-80 parts of fly ash, 30-50 parts of silica fume, 800-1200 parts of fine aggregate, 600-800 parts of coarse aggregate, 2-5 parts of a water reducer, 8-16 parts of reinforced fiber, 10-30 parts of an accelerator, 1-3 parts of cassava starch, 10-30 parts of a reinforcing agent, and 100-200 parts of water; the reinforcing agent is prepared from rice hull ash and superfine calcium carbonate micro powder according to the weight ratio of 1: (1-2), and the preparation method comprises the following steps: uniformly mixing cement and coarse aggregate, adding fly ash, silica fume, fine aggregate and water, uniformly mixing, continuously adding reinforcing fibers, and uniformly mixing to obtain a first mixture; uniformly mixing the first mixture with a