The present invention relates to a waterjet cutting head safety device, as a safety device provided in a waterjet processing device for waterjet processing a workpiece by spraying a waterjet, which is provided in a cutting head of the waterjet processing device to measure the inclination value of the cutting head Inclinometer; A monitoring and control unit that monitors the inclination value of the cutting head measured by the inclinometer, generates an alarm when the inclination value exceeds a reference value, stops the operation of the waterjet processing apparatus, and forcibly stops spraying the waterjet of the cutting head; It characterized in that it comprises a.
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