The utility model relates to an antiskid damper, comprising a clamping plate (1) and a fixing bolt installed on the clamping plate (1). The antiskid damper is characterized in that a locking nut (2) is mounted on the fixing bolt, and antiskid thread patterns are arranged on the inner side of the clamping plate. According to the technical scheme of the utility model, a prior damper is improved; compared with a preformed damper, the antiskid damper is much lower in the price, greatly saves the cost and improves the cost performance; compared with the method in which rubber sheets are arranged in the clamping plate (1) to increase the static friction force between the clamping plate (1) and an earth wire, vibration-proof effect of the antiskid damper is not weakened; and compared with other existing dampers, the antiskid damper can prevent repeated sliding, greatly prolongs the service life, reduces strand breaking and wire breaking accidents of the earth wires, reduces labor intensity of maintaining staff, and provides forceful guarantee for safe production of power system.