Composite bar-shape isolator

The utility model relates to a compound insulation bar-supporting column insulator, comprising a bar core, an external shield and a metal flange; wherein, the bar core is drawn from the epoxy fiberglass; the external shield is formed by vulcanizing the silicone rubber; the external shield is sleeved and attached on the external surface of the core bar, both ends of which are provided with the metal flanges. Due to the excellent craft property, the utility model can increase the creeping distance, improve the umbrella profile and improve the antifouling performance of the external insulation. The insulator can thoroughly solve the problem of the metal flange spalling and the porcelain head freezing of the porcelain bar-supporting column insulator caused by the low temperature in winter and also solve the problem of the high bend intensity of the outdoor porcelain bar-supporting column insulator.