Recyclable 7-shaped plate calibration device of electromagnetic base

The utility model provides a recyclable 7-shaped plate calibration device of an electromagnetic base, and relates to the field of character plate calibration. The 7-shaped plate calibration device of the recyclable electromagnetic base comprises a shell, an opening is formed in one side of the shell, and a magnetic surface is arranged in the center of the shell. According to the recyclable character plate calibration device of the electromagnetic base, after the shell of the electromagnetic base is placed in an area needing calibration, the magnetic surface of the shell is attached to a steel column, magnetic force generated by electrification enables character steel to tightly attract steel column base metal, a jack is placed in the character plate, and calibration can be conducted; after calibration is completed, the electromagnetic base can be conveniently powered off and taken down for repeated use detection; the two handles are rotated to drive the two driving shafts to rotate, and one ends of the two in