Positioning clamp for CNC automatic equipment

The utility model discloses a positioning fixture for CNC (computer numerical control) automation equipment, which relates to the technical field of CNC automation equipment and comprises a reference frame, a positioning fixture and a positioning fixture. The moving mechanism is mounted in the center of the top of the inner cavity of the reference frame; the traction mechanism is mounted at the lower part of the top of the inner cavity of the reference frame; and the clamping mechanism is located in the center of the bottom of the inner cavity of the reference frame. A columnar workpiece is placed in the center of the top of a rotating table, then a reciprocating lead screw is driven to rotate through rotation of a second bevel gear and a first bevel gear, the reciprocating lead screw drives position movement of an adjusting block, movement of the adjusting block drives position movement of a positioning frame, and by arranging the positioning frame, it can be guaranteed that the columnar workpiece is not pro