The invention relates to a high extended cold-rolled plate, which comprises the following chemical components in percentage by weight: 0.15-0.20% of C, less than or equal to 0.030% of Si, 0.10-0.50% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, 0.01-0.05% of Al, 0.0030-0.0080% of N, and the balance of iron and inevitable
impurity. The production method comprises the following steps: carrying out iron pretreatment, converter melting, refining after the furnace, hot rolling, scouring, cold rolling,
continuous annealing, secondary cold rolling, finishing to obtain the finished product roll, wherein in the process of the hot rolling, the controlled
heating temperature is 1150-1270 DEG C, the finish rolling temperature is more than Ar3, the coiling temperature is less than or equal to 600 DEG C, the cold rolling deflection is more than or equal to 60%, the
continuous annealing temperature is 600-700 DEG C, the annealing time is 40-100 seconds, the secondary cold rolling ratio is 5-15%, the
hardness of the obtained secondary cold-rolled plate is HR30T66-80, and the tensile extension is more than or equal to 5%.