Automatic grinding machine for exhaust valve of main engine

The invention relates to a host exhaust valve automatic grinding machine which comprises a workbench, a control cabinet is arranged at the bottom of the workbench, a lifting device is arranged at the top of the workbench, a display panel is arranged on one side of the control cabinet, and a gas circuit control unit, a circuit control unit and a data processing unit are arranged in the control cabinet. A gas path inlet and a gas path outlet are formed in one side of the control cabinet, the gas path inlet communicates with a gas inlet of a gas path control unit through a gas inlet pipe, a gas outlet of the gas path control unit communicates with the gas path outlet through a gas exhaust pipe, a grinding unit is arranged in the control cabinet, and the gas path control unit is used for providing a power source for the grinding unit. According to the technical scheme, the air cylinder rapidly stretches out and draws back in a reciprocating mode to grind the exhaust valve, the technical effect of overall grinding