Material with high bending strength and preparation method of material

The invention discloses a material with high bending strength and a preparation method of the material. A complex inorganic substance in the material is high in rigidity and hardness and stable in performance. The material is prepared from the following components by weight percent: 15% to 22.1% of silica powder, 10% to 20% of pulverized fuel ash, 4% to 8% of glass fibers, 0.6% to 0.8% of urea-formaldehyde resin adhesive powder, 0.2% to 0.5% of calcium sulfate, 9% to 15% of soft polyurethane complex inorganic compound and the balance of cement, wherein the weight ratio of polyurethane to a complex inorganic compound in the soft polyurethane complex inorganic compound is (7-9) to 10.