High-precision comprehensive grating measuring instrument for belt pulley

The invention discloses a high-precision comprehensive grating measuring instrument for a belt pulley, which comprises a bracket and a digital indicator arranged on the bracket, wherein a platform is arranged on the bracket; a first supporting base and a second supporting base are arranged on the platform; a guiding shaft is arranged between the first supporting base and the second supporting base; a sliding base is sleeved on the guiding shaft; a first measuring column is arranged on the first supporting base; a second measuring column is arranged on the sliding base; the first measuring column and the second measuring column are located on a same straight line parallel to the guiding shaft; a dragging device is connected with one end of the sliding base close to the first measuring column; a grating ruler is arranged on the platform; and a ruler grating of the grating ruler is fixed on the sliding base. The high-precision comprehensive grating measuring instrument for the belt pulley has a simple structure, is accurate and stable to measure, is convenient to operate and is capable of increasing the working efficiency; a true technical data is supplied to the quality control of machining; and an effective measuring device is supplied to the processing control of the belt pulley.