Full-automatic sheet polishing machine

The invention provides a full-automatic sheet polishing machine which comprises a machine frame, a main shaft mechanism is arranged on the machine frame, a station platform assembly is arranged on the machine frame and located below the main shaft mechanism, and the station platform assembly is arranged in the X-axis direction of the machine frame in a sliding mode. A positioning assembly and a cleaning lifting assembly are sequentially arranged on the side, away from the main shaft mechanism, of the station platform assembly, a feeding and discharging support is arranged on the machine frame and located above the positioning assembly and the cleaning lifting assembly, and an automatic feeding and discharging assembly is arranged on the feeding and discharging support. All the actions can be completed by the machine, manual operation is not needed in the process, and the problems that in the prior art, a polishing machine is low in automation degree and low in machining efficiency can be effectively solved th