Live-line work small animal prevention device

The invention discloses a live-line work small animal prevention device, which comprises a fixed line segment, a fixed sleeve and a rotary thorn ball, and is characterized in that the rotary thorn ball can rotate around the fixed line segment by 360 degrees in the fixed sleeve; the fixing sleeve comprises a lower sleeve shell, an upper sleeve shell, a movable buckle and a pressing assembly located between the lower sleeve shell and the upper sleeve shell and used for pressing and fixing a line segment, and the lower sleeve shell and the upper sleeve shell are hinged and buckled and closed through the movable buckle. The rotating thorn ball comprises a lower hemisphere sleeve and an upper hemisphere sleeve, the structure of the upper hemisphere sleeve is consistent with that of the lower hemisphere sleeve, through the design of the fixed sleeve and the rotating thorn ball, the rotating thorn ball can rotate by 360 degrees in all directions on a fixed line segment, and small animals can be prevented from contin