Novel spark plug

The utility model discloses a novel spark plug, including wiring nut, ceramic insulator, metal screw rod, metal casing and center electrode, wiring nut lower extreme is connected with the metal screw rod, metal screw rod outside cover has ceramic insulator, the outside cover of ceramic insulator lower extreme has metal casing, still be equipped with one deck polyetheretherketone resin layer between ceramic insulator and the metal screw rod, metal screw rod lower extreme is equipped with center electrode, the tip runs through ceramic insulator and metal casing under the center electrode, metal casing's lower extreme is equipped with the threaded connection section, and metal casing's lower extreme still is equipped with telluric electricity field, be equipped with the ignition clearance between telluric electricity field and the center electrode. The utility model discloses simple structure is equipped with the multiple layer sealing structure, and insulating properties is good, can prevent the production of electric arc.