Euro-mill maintenance protection device

The utility model discloses a Euro-mill maintenance protection device which comprises a mill and an observation door arranged on the mill. A pressing arm is horizontally arranged on the outer side of the observation door; a contact switch is arranged between the joint of the observation door and the mill. The Euro-mill maintenance protection door has the advantages that the observation door is detected whether to be in the close state or not; when a mill is in states (the observation door is opened) of shutdown, maintenance and the like, the control function of an electrical cabinet fails, in other words, the electrical cabinet is at the out-of-control state (no matter the electrical cabinet is in the opening state, switching by hanging 'no switching on' board state and the like or not), and machinery equipment cannot run even if operating personnel or other personnel operate the equipment by mistake, so that occurrence of accidents due to false operation on the machinery equipment can be effectively avoided.