The invention provides a tower lightning protection and grounding device, including a conductive connecting rod (3) and a grounding electrode (5) which are vertically arranged. The upper portion of the conductive connecting rod (3) can be electrically connected with a leg of the tower (1). The grounding electrode (5) comprises a coiled segment (51) and a connecting segment (52). The coiled segment (51) can be disposed in a sleeving manner outside a tower base (2) below the ground (4). The coiled segment (51) is electrically connected with the lower portion of the conductive connecting rod (3) through the connecting segment (52). According to the invention, the lower portion of grounding electrode is buried to a similar depth to that of the bottom of the tower base and laid in a plane manner surrounding the bottom of the tower base, so as to avoid secondary excavation in a laying phase, reduce the work amount and construction cost, and improve the tower grounding construction efficiency.