Grinding wheel dressing device

The invention provides a grinding wheel dressing device. The device comprises a mounting rack, bearing seats, a driving rotating shaft, diamond rollers, rough adjustment positioning assemblies and fine adjustment positioning assemblies, wherein the two ends of the driving rotating shaft are mounted in the bearing seats at the two ends of the rack by means of bearings, the plurality of diamond rollers are mounted on the driving rotating shaft, the rough adjustment positioning assemblies are symmetrically arranged on the two sides of the diamond rollers correspondingly, a plurality of first adjusting holes are formed in the two sides of the driving rotating shaft in an axis direction at intervals, the rough adjustment positioning assemblies are fixedly connected with the driving rotating shaft by means of a plurality of first fastening bolts, the fine adjustment positioning assemblies are arranged on the sides, facing the diamond rollers, of the rough adjustment positioning assemblies, a plurality of fine adjus