High strength ultra-thick steel plate having excellent brittle crack propagation stopping characteristics and manufaturing method of same

The purpose of the present invention is to provide a high strength, ultra-thick steel plate having a plate thickness of 70 mm or more and excellent brittle crack propagation stopping characteristics and a manufacturing method of the same. The high strength, ultra-thick steel plate having a plate thickness of 70 mm or more and excellent brittle crack propagation stopping characteristics comprises: a component composition including, as a mass%, C: at 0.03-0.20%, Si: at 0.03-0.5%, Mn: at 0.5-2.2%, P: at 0.01 % or less, S: at 0.005% or less, Ti: at 0.005-0.03%, Al: at 0.005-0.080%, and N: at 0.0050% or less, and Ceq defined in formula (1) is 0.36 or more and 0.40 or less; and a remainder portion consisting of Fe and unavoidable impurities; and an aggregate structure in which the (211) plane integration degree in a rolled surface at a plate thickness center is 1.2 or more and the (200)plane integration degree in a rolled surface in a steel plate surface is 1.7 or more, wherein a Charpy fracture transition temperature vTrs in a plate thickness 1/4 position is -40 degrees Celsius or less; and wherein a Charpy fracture transition temperature vTrs in the steel plate surface is -80 degrees Celsius or less.