A novel pulling plate structure for a three-dimensional wound core of a transformer, including a three-dimensional wound core spliced by three rectangular single frames, the three-dimensional wound core includes three core legs, an upper iron yoke and a lower iron yoke, an upper frame surrounding the upper iron yoke is installed in a top of the three-dimensional wound core, a lower frame surrounding the upper iron yoke is installed at a bottom of the three-dimensional wound core, the core leg has a longitudinal cross-section opposite and parallel to inside faces of the upper frame and the lower frame, a pulling plate is installed in a plane of the longitudinal cross-section, the pulling plate is connected with the upper frame and the lower frame.