The invention relates to a three-roller strip head forming device with a pinching function. The three-roller strip head forming device comprises a frame, an upper roller, an inlet lower roller, an outlet lower roller, an inlet guide plate, a middle transition guide plate, an outlet guide plate, a lower roller height adjusting mechanism and a transmission device, the upper roller is matched with the inlet lower roller to form a pinching roller set, the upper roller, the inlet lower roller and the outlet lower roller are matched to form a strip head forming roller set, the transmission device rotates forwards or backwards to drive strip steel to a crop shear device or to return to the strip head forming roller set for forming, and the lower roller height adjusting mechanism can adjust the heights of the inlet lower roller and the outlet lower roller, so that the forming requirement of the strip steel with different thicknesses is met. The three-roller strip head forming device has the advantages that the strip steel is conveyed and formed, the device can adapt to the strip steel with different thicknesses, the head of the strip steel obtains the needed bent shape, and a strip can smoothly penetrate the three-roller strip head forming device as the inlet guide plate, the middle guide plate and the outlet guide plate are designed.