The invention relates to an inclined pull regulating mechanism of a forme of an intermittent printing press, which comprises a blanket cylinder, on which a seam clamp bar attachment frame and a rear clamp bar attachment frame of the forme are arranged. Driving pinions are respectively arranged at both sides of the bottom of the seam clamp bar attachment frame. The screw thread fit is adopted between the driving pinions and the seam clamp bar attachment frame. A central axis hole is opened at the blanket cylinder, and a vent breather communicated with the central axis hole is opened at a gap of the blanket cylinder. A driving pinion rack device is arranged at the vent breather. The driving pinion rack device is in mesh with the driving pinions. A driving lever device is arranged at the spigot shaft hole. The rear end of the driving lever device extends outwards and protrudes from the central axis hole. The forepart of the driving lever device is in the central axis hole and the odontogram in mesh with the driving pinion rack is arranged on the lever. The rear end of the driving lever device is connected with the adjusting gear through a bearing; the regulating mechanism of the invention is compact in structure and can regulate the forme without stopping the machine.