The 35kV ultra-high-speed catenary insulation extrusion production line is used for the extrusion of 6-35kV crosslinked cable cores. The production line can continuously and reliably operate at high speeds according to different process requirements. The high-speed crosslinking system achieves industry-leading production efficiency and quality control; precise control of catenary displacement ensures stable sag; high stability is supported by an intelligent water and gas control system; and full-line servo-linked control ensures high-speed and stable operation of the production line.