Combined insulator

The invention relates to a combined insulator, and belongs to the technical field of high-voltage line auxiliary parts. According to the invention, the problems that the tensile strength of the existing insulator is insufficient and the physical resistance needs to be improved are solved. The insulator comprises an insulator body which is used for electrical isolation, positioning tables which arearranged on the two sides of the insulator body and are used for clamping and positioning the insulator body, reinforcing rings which are tensioned between the positioning tables to form internal reinforcing ribs, umbrella skirts which are arranged on the outer sides of the insulator body and the reinforcing rings in a sleeving manner and provide protection for the insulator body and the reinforcing rings, and a lightning protection pressing ring group which is arranged on the outer sides of the positioning tables and is used for performing a lightning protection function, wherein a mountingbase for fixing a high-vol