High-tenacity -130 DEG C low-temperature steel and manufacturing method thereof

The invention discloses high-tenacity -130 DEG C low-temperature steel and a manufacturing method thereof, which belong to the field of manufacturing of low alloy steel. The steel consists of the following chemical components in percentage by weight: less than or equal to 0.12 percent of C, 0.10 to 0.35 percent of Si, 0.30 to 1.00 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, 4.70 to 5.30 percent of Ni, 0.005 to 0.10 percent of Al, one or more of less than or equal to 0.040 percent of Nb, less than or equal to 0.060 percent of V, less than or equal to 0.25 percent of Cr, less than or equal to 0.50 percent of Mo, less than or equal to 0.050 percent of Zr and less than or equal to 0.020 percent of RE and the balance of Fe. A one-time quenching and tempering heat treatment process or a two-time quenching and one-time tempering heat treatment process is used as a steel production process; the steel has stable tissues and stable and high -130 DEG C low-temperatu