The spherical column railing is a hot-dip zinc assembled fence, which has excellent anti-corrosion performance, is economical and practical, and is convenient and quick to install. Generally, there is a design for installing fences in factories. The columns are processed and manufactured in factories, installed and fixed on site, and cross bars are assembled. This greatly speeds up the construction progress on site. The spherical column fence is especially suitable for water plants, sewage treatment plants, power plants, chemical plants.