Yarn feeder for flat knitting machine and flat knitting machine

The utility model discloses a yarn feeder for a flat knitting machine and the flat knitting machine. The utility model belongs to the field of flat knitting machines, the yarn carrier comprises a yarncarrier handle and a yarn carrier head. A mounting hole is formed in the upper part of the yarn nozzle handle; a through hole is formed in the lower part of the yarn nozzle handle; the yarn nozzle head is connected to the yarn nozzle handle and located at the bottom end of the through opening. The yarn nozzle head is provided with a main yarn hole which is vertically formed in a penetrating modeand communicated with the through opening, a yarn adding groove communicated with the main yarn hole is formed in the front side of the yarn nozzle head in the transverse direction, a yarn removing hole communicated with the main yarn hole is formed in the rear side of the yarn nozzle head, and a height difference exists between the transverse middle portion of the yarn adding groove and the two ends of the yarn adding gro