The utility model discloses a movable work hanging point of a transmission tower cross arm. The movable work hanging point comprises an upper buckle (1) and a lower buckle (2), connecting bolts (3) are arranged between the upper buckle (1) and the lower buckle (2), and a hanging ring (4) is arranged on the lower buckle (2). The upper buckle and the lower buckle are clamped on the upper portion and the lower portion of the cross arm, the bolts are used for connecting and fixing, a jacking tool is hung on the hanging point, the condition that a rope sleeve is adopted as a cross arm hanging point previously is changed, the movable work hanging point is firm in connection and is not prone to loosening, and potential safety hazards are eliminated.