Leather sheath threading auxiliary device

The utility model relates to the technical field of textile machinery, and provides a leather sheath threading auxiliary device which comprises a rack, a threading needle, a bearing frame and a driving piece. A plurality of threading needles are arranged, and the plurality of threading needles are arranged in parallel at intervals; the plurality of threading needles are detachably connected with the rack, and the needle heads of the threading needles are used for being connected with the connecting wires on the leather sheath; the supporting frame is movably arranged on the rack in the axis direction of the threading needle, and the supporting frame is used for being connected with a sofa main board; the sofa main board is provided with a first side surface and a second side surface deviating from each other; the driving part is connected with the supporting frame and drives the supporting frame to be switched between a first position and a second position relative to the threading needle; under the condition