The invention discloses a fastening paper cover and spider-tail winding structure of an automatic contracting mold, which belongs to the mechanical field. A fastening paper cover and spider-tail winding structure of an automatic contracting mold. The structure comprises support brackets slidingly connected at the left and right ends of the slide table, an electrostatic multiplexing device is disposed on one side of the tape fixing hook plate. A servo motor is fixedly connected to one end of the first fixing plate near the second fixing plate. The rotating end of the servo motor is fixedly connected with a shrink disk, the shrink disk is accurately contracted by the servo motor for the overall diameter. The paper cover is fastened to the end surface of the coil to complete the fastening. After the fastening, a spider-tail winding device is used to imitate spider hunting to press the tape down against the opposite surface of the paper cover, and wind on the paper cover at the end of thecoil. The electrostatic multiplexing device is used to imitate the human hand to bond and the fix the tape cutting head, thereby avoiding human hand contacting the contact surface of the tape, affecting the pasting effect, and greatly reducing the secondary adhesion of the tape cutting head and the paper cover before and after winding the tape, and improving the work efficiency.