The invention provides a live-line work device, and relates to the technical field of electric power overhaul devices. The device comprises a mechanical arm assembly and a control device, and furthercomprises a fixed assembly and a fixed part which are sequentially arranged from top to bottom. The mechanical arm assembly is arranged on the fixed assembly, and the control device is arranged in thefixed assembly and electrically connected with the mechanical arm assembly. The fixed part is connected with a side, away from the mechanical arm assembly, of the fixed assembly, and a placement areafor placing a bucket arm vehicle control box is arranged in the fixed part. The technical problem of low stability of a live-line maintenance device in the operation process is relieved, the overallstructure of the live-line maintenance device is optimized, and the operation stability is high.