A method of producing a large-thickness high-strength steel plate with lamellar tear resistance with 960MP-level yield strength, wherein the steel plate consists of following constituents by weight percentage: C: 0.15 - 0.20%, Si: 0.10 - 0.40%, Mn: 0.90 - 1.30%, Nb: 0.010 - 0.040%, V: 0.010 - 0.045%, Ti: ≤ 0.010%, Al: 0.03 - 0.06%, Ni: 0.50 - 1.00%, Cu: ≤ 0.1%, Cr: 0.30 - 0.80%, Mo: 0.20 - 0.70%, B: 0.001 - 0.005%, Ca: 0.001 - 0.005%, P: ≤ 0.010%, S: ≤ 0.002%, O: ≤ 0.002%, N: ≤ 0.004%, H: ≤ 0.00015%, the balance is Fe and inevitable impurity elements; Carbon Equivalent Value CEV: 0.58 - 0.68%, wherein the CEV is calculated from a carbon equivalent formula CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; the method comprises following steps: smelting corresponding chemical components are smelted by electric furnace or converter, out-of-furnace refining and vacuum treatment are used to perform fine tuning; Ca Treatment the molten steel is fed with Ca after vacuum treatment, wherein an added amount of Ca is controlled to be within 0.001 - 0.005%; after treatment, the molten steel is softly stirred for no less than 10 minutes; continuous casting the molten steel is poured with low overheat, under argon protection in the whole process and under dynamic soft reduction control, the overheat of molten steel is controlled at 5 - 20°C, so as to obtain a continuous casting slab, wherein the continuous casting slab has center segregation of no higher than C1.0, center porosity of no higher than grade 1.0, when the center segregation and the center porosity are determined according to Standard YB/T 4003-2016; and the thickness of the continuous casting slab is controlled to be 3 or more times the thickness of a target steel plate; heating and rolling the slab is heated to 1150-1250°C, and the duration of heating is 8-14min / cm; after the slab is removed out of the furnace, performing descaling treatment with high-pressure water, and performing two stages of rolling: rough rolling + finish rolling; wherein a start rolling temperature of the rough rolling is 1050-1 100°C; in a high-temperature stage of the rough rolling, the temperature is kept to be ≥ 960°C and the total reduction rate is ≥ 55%; the reduction rate of the last two passes of the rough rolling is ≥ 15%, a start rolling temperature of finish rolling is controlled at 800-850°C, and the final rolling is controlled at a lower temperature of 780-830°C; slow cooling treatment of steel plate after rolling, the steel plate is not cooled, but quickly enters a thermal insulation cover, the temperature of entering the cover is ≥ 350°C and the cooling time under the cover is ≥ 24 hours; heat treatment for quenching & tempering after slow cooling, the steel plate is treated with quenching, the quenching temperature is 900 - 940°C, and after the furnace temperature reaches the temperature, the holding duration is 30 - 90min; the tempering temperature for steel plate is 560 - 620°C, and after the furnace temperature reaches the temperature, the holding duration is 50 - 120min. smelting corresponding chemical components are smelted by electric furnace or converter, out-of-furnace refining and vacuum treatment are used to perform fine tuning; Ca Treatment the molten steel is fed with Ca after vacuum treatment, wherein an added amount of Ca is controlled to be within 0.001 - 0.005%; after treatment, the molten steel is softly stirred for no less than 10 minutes; continuous casting the molten steel is poured with low overheat, under argon protection in the whole process and under dynamic soft reduction control, the overheat of molten steel is controlled at 5 - 20°C, so as to obtain a continuous casting slab, wherein the continuous casting slab has center segregation of no higher than C1.0, center porosity of no higher than grade 1.0, when the center segregation and the center porosity are determined according to Standard YB/T 4003-2016; and the thickness of the continuous casting slab is controlled to be 3 or more times the thickness of a target steel plate; heating and rolling the slab is heated to 1150-1250°C, and the duration of heating is 8-14min / cm; after the slab is removed out of the furnace, performing descaling treatment with high-pressure water, and performing two stages of rolling: rough rolling + finish rolling; wherein a start rolling temperature of the rough rolling is 1050-1 100°C; in a high-temperature stage of the rough rolling, the temperature is kept to be ≥ 960°C and the total reduction rate is ≥ 55%; the reduction rate of the last two passes of the rough rolling is ≥ 15%, a start rolling temperature of finish rolling is controlled at 800-850°C, and the final rolling is controlled at a lower temperature of 780-830°C; slow cooling treatment of steel plate after rolling, the steel plate is not cooled, but quickly enters a thermal insulation cover, the temperature of entering the cover is ≥ 350°C and the cooling time under the cover is ≥ 24 hours; heat treatment for quenching & tempering after slow cooling, the steel plate is treated with quenching, the quenching temperature is 900 - 940°C, and after the furnace temperature reaches the temperature, the holding duration is 30 - 90min; the tempering temperature for steel plate is 560 - 620°C, and after the furnace temperature reaches the temperature, the holding duration is 50 - 120min.