Machine tool crash safety protection system and monitoring method thereof

The invention relates to a machine tool crash safety protection system and a monitoring method thereof; a monitoring recording module, a fault recording module and an information database are arranged in a controller of the machine tool so as to form the protection system; the controller is connected with a man-machine interface used for setting and displaying control parameters of the controller; the monitoring recording module is used for monitoring whether an abnormal load value of the machine tool in fast motion or cutting process is bigger than a set load value or not; if the abnormal load value is bigger than the set load value, crash must have happened, the controller needs to stop machine operation immediately, and the fault recording module stores the fault parameters in the information database, and the man-machine interface can be used for checking and displaying the fault parameter information, thus reducing impact force of the machine tool in crash, reducing maintenance cost, and the abnormal load information of the machine tool in failure can be checked.