Automatic bottom abrading machine of ceramic product

The utility model relates to an automatic bottom abrading machine of a ceramic product. The machine comprises an upper stand and a lower stand, wherein the lower stand is provided with a cyclic feed belt and a first motor; the cyclic feed belt is driven by the first motor; the upper stand is provided with an abrasive disc assembly comprising a horizontal abrasive disc and a second motor for driving the horizontal abrasive disc to rotate; the mounting direction of the rotating shaft of the horizontal abrasive disc is vertical direction and the rotating shaft of the horizontal abrasive disc is connected with the rotating shaft of the second motor; the horizontal abrasive disc is located at the bottom of the abrasive disc assembly; the upper stand is further provided with a vertical power mechanism for driving the abrasive disc assembly to move up and down, and fixedly provided with a first photoelectrical eye device in front of which the abrasive disc assembly is located; a PLC (Programmable Logic Controller) i