The invention relates to low-roll-force gas-transmission pipeline steel which unit roll-force is lower than 18Kn/mm and a production method thereof. The pipeline steel comprises the following main components in percentage by weight: 96.3-98.6 wt% of Fe, 0.030-0.010 wt% of C, 1.20-1.90 wt% of Mn, 0.10-0.35 wt% of Si, 0.015-0.120 wt% of Nb, 0.005-0.025 wt% of Ti, 0.001-0.005 wt% of N and 0.020-0.040 wt% of Alt, wherein the Ti/N ratio is equal to 3-6, and the Ca/Alt ratio is greater than or equal to 0.10. The pipeline steel also comprises the following residual components in percentage by weight: at most 0.004 wt% of O, at most 0.010 wt% of P, at most 0.003 wt% of S, at most 0.03 wt% of As, at most 0.02 wt% of Sn and at most 0.02 wt% of Sb. A thick/medium plate rolling machine, of which the unit roll force is lower than 18 kN/mm, can be utilized to effectively roll various thin/medium/thick casting blanks to produce the gas-transmission pipeline steel with favorable anti-cracking performance in a ferrous metallurgy enterprise on a common equipment level by slightly adjusting the technique.