Lightning arrester core body, lightning arrester body and multi-column parallel lightning arrester

The invention provides a lightning arrester core body, a lightning arrester body and a multi-column parallel lightning arrester. The lightning arrester core body comprises a plurality of resistor discs, wherein the resistor discs are arranged at intervals in the axial direction of the resistor discs, and are used for carrying out amplitude reduction on invading flow waves so as to realize voltage limitation, a metal thickening cushion block is stacked between any two adjacent resistor discs to form a columnar structure, and the thickness of the metal thickening cushion block is greater than that of each resistor disc. According to the invention, through the metal thickening cushion block stacked between any two resistor discs, the direct contact between any two resistor discs can be avoided, and when the resistor discs have insulation defects and generate surface flickering to generate electric arcs, the metal thickening cushion block inhibits the electric arcs from ablating the resistor discs adjacent to the