The invention discloses a high-strength aluminum alloy plate. The high-strength aluminum alloy plate is prepared from, by weight, 5.8%-8.2% of silicon, 2.6%-5.4% of copper, 2.8%-6.3% of magnesium, 7.8%-10.7% of zinc, 0.1%-0.5% of chromium, 0.1%-0.4% of titanium, aluminum and unavoidable impurities. According to the high-strength aluminum alloy plate, the strength and the good molding property of the aluminum alloy plate can be improved by adding zinc, iron and titanium metal additives; it can be guaranteed that the contents of the components are accurate through spectrum analysis of a spectrumanalyzer; the water temperature is controlled at 20 DEG C or above in the water quenching process, and therefore the condition that the aluminum alloy plate machining quality is influenced due to thefact that the water temperature is too low can be avoided; and a hot rolling method is adopted as a machining method, through a series of machining including smelting, refining, annealing, casting, hot rolling, water quenching, cold rolling, finishing and artificial aging treatment, fusion machining can be well conducted on raw materials, the materials are fully mixed, a finished product meets any needed roughness machining after being subjected to finishing, and a better using prospect is brought.