The invention discloses an automatic winding displacement fixed length cutting machine cotton paper pasting mechanism, which comprises a back plate, a material conveying disc and a material carrying seat and is characterized in that a rotating shaft connected with a driving mechanism is arranged on the back plate, the material conveying disc is sheathed on the rotating shaft, a lower pressing air cylinder is arranged in a back plate position at the back end of the material conveying disc, the bottom of the lower pressing air cylinder is provided with a press block, the material carrying seat used for conveying wire harnesses is arranged under the press block, a transverse moving air cylinder is arranged on the back plate, an air cylinder rod of the transverse moving air cylinder is connected with a moving plate, a clamping air cylinder is connected with the front surface of the moving plate, and the clamping air cylinder controls a clamp claw to clamp material belts conveyed out by the material conveying disc. The automatic winding displacement fixed length cutting machine cotton paper pasting mechanism solves the problems that the long-dimension wire harness adopts a manual cotton paper pasting mode, the speed is low, the efficiency is low, the perfect matching with the subsequent cutting work procedure cannot be realized, the cotton paper pasting position can easily deviate, and the subsequent processing can be influenced. The invention provides the automatic winding displacement fixed length cutting machine cotton paper pasting mechanism with the advantages that the wire harness cotton paper pasting position can be fast and accurately found, and in addition, the automation degree is high.