The invention relates to the technical field of glass production, in particular to high-performance glass and a preparation method thereof. The high-performance glass comprises the following raw materials in parts by weight: 50-60 parts of silicon dioxide, 7-15 parts of sodium oxide, 1-3 parts of potassium oxide, 3-6 parts of magnesium oxide and 4-6 parts of a nano composite. The nano composite for preparing the high-performance glass is prepared by taking ammonium ceric nitrate, ferrous chloride and polyethylene imine as raw materials with a hydrothermal method under a weak base condition, and the nano composite is taken as the preparation raw material of the high-performance glass, so that the high-performance glass has excellent ultraviolet and infrared resistance, has good light transmittance within a visible light scope, and is high in folding strength and excellent in acid resistance.