Levelling structure of flat grinding machine

The invention provides a levelling structure of a flat grinding machine. The levelling structure comprises a base, a workbench is fixed to the upper end of the base, a positioning assembly is fixed to the workbench and comprises a sliding base, two level detectors are fixed to the sliding base, and the levelness of the positioning assembly can be detected through the action of the two level detectors; baffles are fixed to the two sides of the workbench respectively, the baffles on the two sides are each fixedly provided with an infrared ray emitter and an infrared ray receiver, and the levelness of a grinding wheel can be detected through the infrared ray emitters and the infrared ray receivers. According to the levelling structure of the flat grinding machine, a level error of the base can be detected through the level detectors, an error of the grinding wheel is detected through the infrared ray emitters and the infrared ray receivers, and therefore the grinding wheel grinding error phenomenon caused by the