The utility model provides a kind of mechanical fault diagnosis device, belong to mechanical component testing device field.The mechanical component diagnosis device includes measurement module, measurement module includes shell and the transmission rotating shaft rotationally arranged in shell, the one end of transmission rotating shaft is the input end for input torque, the other end of transmission rotating shaft is the output end for with hand shake interface plug-in and output torque, magnetic-restraining body is set on transmission rotating shaft, sensor probe for detecting the magnetic permeability of magnetic-restraining body is equipped in shell.The mechanical fault diagnosis device in the utility model is simple in structure, smaller in size, lighter in weight, improves the portability of the mechanical fault diagnosis device.
