The utility model relates to a column type porcelain insulator with lightning protection function, including vase and arrester, the cap of raising to the higher plane of principle is installed on top at the vase, steel cap under install the bottom of vase, a system has the connecting seat on the right side of the cap of raising to the higher plane of principle, the system has the hole on the connecting seat, the connecting seat passes through the left end fixed connection that connecting bolt is excellent with metallic interconnect, the right -hand member of metallic interconnect stick is downwards crooked, the elbow connects fixedly with the arrester top soon downwards, the electrode bar is equipped with admittedly to bottom at the arrester, the left side end level of electrode bar is extended to the left side, and constitute air gap down between the steel cap. The utility model discloses have the function that prevents the thunderbolt tripping operation, prevent that the thunder and lightning from producing power frequency arc later, do not need to use with other arrester cooperation, and the simple installation, can not influence the lightning protection ability because of the installation quality.