The invention discloses steel used for welding a hull with high strength and high input energy, which comprises the following components in percentage by mass: 0.06-0.10% of C, 0.10-0.25% of Si, 0.9-1.15% of Mn, 0 .01-0.03% of Nb, 0.010-0.020% of Ti, 0.015-0.030% of Al, and the balance of Fe and inevitable impurity elements. The manufacturing method of the steel comprises the steps of deforming blanks or deformed hot-rolled sheets at the temperature between 1150 and 860 DEG C by at least four passes with the single-pass screw-down rate of 8-30% and the cumulative screw-down rate of 50-75%; and controlling cooling properly after rolling, cooling at the speed of 10-20 DEG C/S before reaching 580 DEG C and then cooling to room temperature casually. The steel used for welding the hull with high strength and high input energy has simple chemical components, the production method is controlled easily, and the comprehensive mechanical properties of the weld joint and the welding heat affected zone of the obtained product after being welded with the input energy of 50-100KJ/cm without being preheated is not lower than those of the parent metal.