Mirror surface polishing machine for wide thin plate

The utility model belongs to the field of thin plate mirror polishing machines, and relates to a wide thin plate mirror polishing machine which comprises a workbench, a walking track arranged below the workbench, a polishing machine rack arranged on the walking track and a real-time operation and monitoring system. A gantry type polishing head, a polishing agent spraying device and a dust removal device are installed on the polishing machine rack, and a polishing cloth wheel is arranged on the gantry type polishing head. According to the utility model, the cooling pipeline in the workbench can be used for cooling a plate to be processed in the processing process, so that the phenomena of overheating deformation, surface defects and the like of the plate are prevented; the gantry type polishing head conducts polishing operation on the aluminum plate in the mode that the gantry type polishing head moves on the walking track in a reciprocating mode. Through reciprocating motion of the polishing machine head and