The invention discloses a nuclear container steel with tensile strength of more than 690MPa level and a production method. The steel comprises the following chemical components in percentage by weight: less than or equal to 0.08 percent of C, 0.15 to 0.50 percent of Si, 1.30 to 1.60 percent of Mn, 0.01 to 0.05 percent of Alt, 0.42 to 0.70 percent of Ni, 0.32 to 0.60 percent of Mo, 0.10 to 0.30 percent of Cr, 0.01 to 0.04 percent of Ti, less than or equal to 0.008 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.005 percent of N, less than or equal to 0.03 percent of Cu, less than or equal to 0.007 percent of V, less than or equal to 0.005 percent of Sn, less than or equal to 0.005 percent of Sb, less than or equal to 0.010 percent of As, less than or equal to 0.005 percent of Pb, and the balance of Fe and inevitable impurities, wherein P, S, N, Cu, V, Sn, Sb, As and Pb are used as controlled elements. The production method comprises the following steps of: smelting clean steel, performing continuous casting, cooling casting blank to room temperature, heating the casting blank, performing heat preservation, rough rolling and finish rolling, quenching,tempering, and naturally cooling to room temperature. The steel can improve the safety and the reliability in the operation of a nuclear power plant, and has the advantages of high strength, low welding crack sensitivity, low radiation embrittlement effect and excellent tensile property and welding property at the temperature of 20 DEG C below zero.