The invention provides an S spring roll bending machine, which belongs to the technical field of machinery, and solves the problem of low roll bending efficiency of S springs in the prior art. The S spring roll bending machine comprises a machine seat and a vertical plate vertically fixed on the machine seat, wherein a conveying rail with a conveying passage at the inside is fixedly arranged at one side of the vertical plate; the conveying rail is in an arc shape; a long slotted hole is formed in the conveying rail; a first rotating shaft is fixed on the vertical plate in a peripheral rotation axial fixing mode; an advancing gear capable of driving an S spring to forwards move is fixed on the first rotating shaft; the advancing gear is positioned above the conveying rail; in addition, teeth of the advancing gear extend into the long slotted hole; a second rotating shaft is also fixed on the vertical plate in a peripheral rotation axial fixing mode; a bending gear enabling the S ring to bend is fixed on the second rotating shaft; the bending gear is positioned at the discharging end of the conveying rail; a regulating structure capable of regulating the bending degree of the S spring is arranged at one side of the bending gear; a guide rail is arranged at the other side of the bending gear. The S spring roll bending machine has the advantage that the S spring roll bending efficiency is improved.