The invention relates to a discharge counter for a line lightning arrester. The discharge counter for the line lightning arrester comprises a shell, a glass sealing cover, a valve block, a silicon bridge rectifier, a capacitor, an electromagnetic counter and a display screen. The glass sealing cover is a convex sphere type glass sealing cover, and the outer surface of numbers of the display screen are covered with a fluorescent layer. The discharge counter for the line lightning arrester can adapt to the height of a transmission tower, and full-screen large-size numbers can be displayed in a page turning mode; meanwhile, the numbers are coated with fluorescent powder, so requirements for night observation are met. Convex sphere glass is adopted in the glass sealing cover of the counter, and the digital display effect can be further enhanced.