Protective device for vertical hammer grinder

The utility model relates to a protective device for a vertical hammer grinder, which has a protection function. The protective device comprises a shell and an access door, wherein a bolt of the access door is a cylinder piston rod, an electromagnetic switch is connected with the input end of a cylinder power supply and controls the work of a cylinder, a travel switch is positioned on the shell, a contact of the travel switch is matched with the access door in a loose way or a tight way, and the travel switch is connected with the input end of a power supply of a motor in the vertical hammer grinder and controls the start of the motor. The protective device has the advantages that due to the arrangement of the access door, the grinder is ensured to be in power failure and not to work before the access door is closed, thus ensuring the safety of overhauling personnel.