The utility model relates to a disk-shaped glass insulator with a deicing device, which is characterized by comprising a deicing device. The deicing device comprises cleaning sheets (2), fan blades (3), brush heads (4) and fixed rings (5). The cleaning sheets (2) are C-shaped. The fan blades (3) are fixed to the middle parts of the outer sides of the C-shaped cleaning sheets (2). The brush heads (4) are fixed to the inner sides of the C-shaped cleaning sheets (2). The shapes of the outer edges of the brush heads (4) are matched with the shape of the umbrella disc (1) of the insulator. An upper fixed ring is sleeved on the iron cap (7) of the insulator and a lower fixed ring is sleeved on the steel pin (8) of the insulator. One ends of the C-shaped cleaning sheets are clamped onto the upper fixed ring, and the other ends of the C-shaped cleaning sheets are clamped onto the lower fixed ring. Due to the adoption of the device, ice coated on the surface of the insulator can be effectively removed. Therefore, the occurrence probability of ice flashover accidents is lowered.