Anti-deformation X80-X100 pipeline steel plate

The present invention discloses a line X80-X100 steel sheet and a method for preparing an anti-deformation. The pipeline steel comprises the following components in the percentage by weight: C = 0.04 ~ 0.09%, Si = 0.10 ~ 0.50%, Mn = 1.0 ~ 2.0%, P≤0.015%, S≤0.005%, Nb = 0.05 ~ 0.11% , Ti = 0.010 ~ 0.025%, Mo≤0.30%, Cu≤0.40%, Ni≤0.50%, Cr≤0.40%, the rest comprising Fe. The method for producing an anti-deformation line X80-X100 steel sheet, comprising a slab having the chemical composition of an anti-deformation corresponding plate line X80-X100 claims sequentially by controlled rolling, relaxation, pre-straightening and controlled cooling step deal with. The resulting steel sheet of the present invention not only has good line toughness, good resistance to deformation (stronger than (≦ 0.80), high stress ratio (Rt1.5 / Rt0.5≥1.13) low yield, high uniform elongation (≥10.5%) ), also has a very flat shape of the hot rolled sheet, especially for oil and gas pipeline project "strain resistance based design".