Steel plate surface online automatic polishing equipment suitable for multiple sizes

The invention discloses steel plate surface online automatic polishing equipment suitable for multiple sizes, and relates to the technical field of polishing equipment.The steel plate surface online automatic polishing equipment comprises a workbench, the surface of the workbench is slidably connected with a base through a sliding rail, the surface of the base is connected with a supporting table through a height adjusting part, and an intermittent rotating part is arranged on the surface of the workbench; the reciprocating polishing component is arranged on the surface of the second supporting plate and comprises a moving plate, the reciprocating polishing component moves to repeatedly polish the surface of the steel plate, and the intermittent rotating component moves to drive the base to move intermittently, so that the supporting table and the steel plate on the surface of the supporting table move intermittently. Different longitudinal positions of the surface of the steel plate are fully ground and poli