The invention relates to a high-strength corrosion-resistant HY800 thick plate and a method for producing the same. The thickness of the high-strength corrosion-resistant HY800 thick plate is 50-100 mm. The high-strength corrosion-resistant HY800 thick plate comprises chemical components including, by weight, 0.04-0.07% of C, 0.71-0.76% of Si, 0.82-0.88% of Mn, 0.060-0.07% of P, fewer than 0.005% of S, 0.020-0.045% of Als, 0.82-0.92% of Cr, 0.70-0.75% of Mo, 0.62-0.68% of Cu, 0.075-0.085% of Nb, 0.66-0.72% of Ni, 0.11-0.14% of Zr, the balance Fe and the balance residual elements. The method includes technological processes of high-quality molten iron and KR molten iron pretreatment, operation by the aid of 100/120 ton top-bottom combined blowing converters, refining by the aid of LF (ladle furnaces), vacuum degassing treatment, casting blank stack cooling for 24-60 hours, operation by the aid of pusher type heating furnaces, operation by the aid of 3800m rolling mills, ACC laminar cooling, operation by the aid of 11-roller heat straightening machines, stack cooling, quenching and tempering heat treatment, finishing, external inspection, flow detection and warehousing. The high-strength corrosion-resistant HY800 thick plate and the method have the advantages that standard requirements can be assuredly met by the performance of the steel plate as compared with the traditional HY800 production technologies; the problem of incapability of producing steel plates with the thicknesses higher than 60 mm by means of continuous casting can be solved, the production cycle can be shortened, and production energy consumption can be reduced.