Wire feeding mechanism for wire cutting

The utility model discloses a linear cutting wire feeding mechanism which comprises a sliding base, a control mechanism arranged at the front end of the sliding base and a sliding bottom plate arranged at the upper end of the sliding base, fixed rotating seats are fixedly connected to the left side and the right side of the upper end of the sliding bottom plate, and the top ends of the two fixed rotating seats are arranged in a semi-cylindrical mode. A telescopic outer rod, a telescopic rack rod and a wire tightening rod which can rotate and stretch out and draw back are arranged outside a wire feeding cylinder, so that the wire feeding mechanism can adjust the tightness of a cutting wire through meshing and rotation between the telescopic rack rod and a rotating gear, the length of the cutting wire cannot be reduced, and the cutting efficiency is guaranteed; the compression connecting rod and the compression spring are arranged between the telescopic rack rod and the screw tightening rod, and the indication