The invention relates to a steel plate for a low-temperature pressure container, and a production method of the steel plate, belonging to the technical field of steel smelting processes. According to the technical scheme, the production method comprises the procedures of smelting, continuous casting, heating, rolling, water-cooling, thermal piling and thermal treatment; and the steel plate is prepared by smelting the following components in percentage by mass: 0.03-0.06% of C, 0.16-0.30% of Si, 0.60-0.70% of Mn, less than or equal to 0.008% of P, less than or equal to 0.005% of S, 3.40-3.70% of Ni, 0.07-0.12% of Mo, 0.010-0.020% of Nb, 0.010-0.020% of Ti, 0.020-0.040% of Alt, and the balance of Fe and inevitable impurities. The steel plate has the following advantages that due to continuous casting production, the cost is low and the yield is high; the low-temperature impact resistance is good, and particularly the impact at the weakest part of the steel plate in the position which is 1/2 of the plate thickness at minus 101 DEG C is greater than 150J; the C content is very low; the welding property is good; the Z-direction property is good, that is, the highest Z35 grade can be achieved; and the steel plate which is produced by using the production method provided by the invention has the characteristics of high purity, uniformity in component, excellent mechanical property, low carbon equivalence and good welding property.