The invention relates to a screw adjusting type wool straightening device which comprises a workbench, a movable plate, a spiral lifting mechanism, a driving device, a spring clamping device, movable devices and a console. The workbench is of a rectangular structure, a rectangular groove structure is formed in the middle of the workbench, a step round hole is formed in the middle of the bottom face of the rectangular groove, the rectangular groove and the step round hole of the workbench cooperate with the movable plate and the spiral lifting mechanism for use, and the movable devices are welded to the four corners of the bottom of the workbench. According to the screw adjusting type wool straightening device, the vertical distance of the movable plate is adjusted through a screw, therefore, wool is tightened, movement of the workbench is achieved by adjusting the movable devices at the four corners of the bottom of the workbench, when the workbench moves to a proper position, a self-locking device is opened, the workbench is locked by itself, and the remarkable advantages of being simple and compact in structure, good in manufacturability, convenient to operate, strong in function and the like are achieved.