Steel plate and method for manufacturing same

A method of manufacturing a steel sheet, the method comprising:

• heating a steel slab including, by weight %, C:
• 0.03 to 0.06%, Mn:
• 1.8 to 2.1%, Si:
• 0.05 to 0.2%, Al:
• 0.01 to 0.04%, Ni:
• 0.5 to 1.0%, Ti:
• 0.01 to 0.018%, Nb:
• 0.01 to 0.03%, Mo:
• 0.2 to 0.4%, P:
• 0.008% or less, S:
• 0.002% or less, and a balance of Fe and inevitable impurities in a temperature range of 1050 to 1140° C.;
• rough rolling the heated steel slab at a temperature of 800° C. or higher;
• finish rolling at a temperature of 700° C. or higher after the rough rolling;
• and
• cooling at a cooling rate of 5° C./s or higher to a temperature range of 400 to 700° C. after the finish rolling.