The invention relates to a current dividing device of live-line work of a manipulator, and belongs to the technical field of auxiliary devices of power grid maintenance. The current separation device is formed by manipulators and a current dividing line. Each of the manipulator A and the manipulator B is formed by a moving arm, a fixed arm, a jaw, a speed reduction motor, a screw rod and a nut. A control system is formed by a remote control emission circuit, a remote control receiving circuit, a motor control circuit, a motor torque control circuit, a current dividing measurement circuit, a current indication circuit, a power supply circuit, an externally connected power supply port and a charging circuit. The moving arm of the manipulator arm A is parallelly connected with the moving arm of the manipulator B through the current dividing line. According to the invention, heating faults of connection of circuits, disconnecting links, switches and buses can be quickly processed in a live-line manner; current division is reliable; continuous power supply is ensured; repair time is shortened; occurrence of hidden safety accidents is avoided; and problems of complex operation, long power-cut time, wasting of time and labor, huge pressure and existence of hidden safety hazards in the current powered-off repair and maintenance of circuits are solved.