The invention provides a roll bending adjusting mechanism in an S-spring roll bending machine, belonging to the mechanical technical field. It solves the problem that the adjustment function of the roll bending machine in the prior art is relatively complicated. The invention relates to a roll bending adjusting mechanism in the S-spring rolling bending machine. The S-spring roll bending machine comprises a base and a vertical plate which is vertically fixed on the base. A conveying rail with an internal transfer passage is fixed to one side of the vertical plate. A rotating shaft 2 is fixed to the vertical plate. A bending gear is fixed to the rotating shaft 2. The bending gear is fixed to the discharging end of the conveying rail. The roll bending adjusting mechanism including an adjusting block is arranged on one side of the bending gear. One side of the adjusting block opposite to the bending gear is arc-shaped. A limiting hole is provided on the other side of the adjusting block. An adjusting plate is vertically fixed to the base. The adjusting plate is perpendicular to the vertical plate. An adjusting hole is arranged on the adjusting plate, and the threads of the adjusting hole are connected to an adjusting bolt. The end of the adjusting bolt is arranged in the limiting hole of the adjusting block. The adjusting mechanism has the advantages of simple and convenient adjustment function.