The present invention provides a plate jig for a computer numerical control (CNC) processing machine, fixating an edge part of a perforated part positioned on the interior of the plate. A plurality of first clamps for fixing the edge part of the perforated part of the plate are installed on a jig base, and a second clamp for fixing one side of the edge part of the perforated part of the plate is installed on the jig base. A first clamping member included in each first clamp is rotated while moving upward and downward, and the front end of a second clamping member included in the second clamp is rotated while moving to the edge part of the perforated part of the plate. Therefore, the first clamping member is rotated while moving upward and downward to fixate the plate arranged on the jig base such that the front end part of the first clamping member is moved toward the processed item. Furthermore, the second clamping member is moved along a trajectory toward the processed item when the clamping member is rotated. When the plate having the perforated part is arranged on the jig base, the front ends of the first clamping member and the second clamping member are deviated from an arranged position of the plate, thereby providing no interference when the processed item is mounted and easily fixing the processed item to the first clamping member and the second clamping member.;COPYRIGHT KIPO 2016
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