The invention discloses an insulator supporting type lightning arrester suitable for a distribution network area. The lightning arrester comprises an insulator porcelain bushing supported on a telegraph pole of the distribution network area, a core rod which is arranged in the insulator porcelain bushing and has a first end connected with a grounding grid, and a lightning arrester lead penetratingthrough the insulator porcelain bushing, wherein a first end of the lightning arrester lead is connected with a second end of the core rod, and a second end of the lightning arrester lead is electrically connected with a transformer area phase line of the distribution network area. The lightning arrester is advantaged in that a problem that a lightning arrester lead of a high-voltage lightning arrester is too long is solved, by arranging the lightning arrester inside the insulator supported above the distribution network area, the length of the lead of the lightning arrester is reduced, the lightning arrester is convenient to install and low in construction cost, the lightning protection effect is improved, and safety and attractiveness of the lightning arrester are guaranteed.