Sectionalising cabinet is applied at the cables jointing points for power distribution purpose. The connection method is simple, convenient, complete insulated, fully shielded, compact, light-weighted, oil free, maintenancefree, corrosion resistant, easy to be earthed, flexible to earth and nonexposed live parts. It provides solutions for cables' Tee connection and connections of multiple incoming and outgoing cables. It is applied for urban street, skyscraper buildings, construction sites, large enterprises, and other distribution networks, especially suitable for rebuilding of city's power distribution projects.