The invention provides a multidimensional removal device for fittings of an overhead transmission line. The removal device comprises a main machine and a machine head, wherein a travelling mechanism is arranged on the main machine; a power supply, a controller and a control circuit are arranged in the main machine; a safety mechanism is arranged at the lower part of the travelling mechanism; the machine head comprises a wire fixing sleeve, a multidimensional work bench capable of controlling multidirectional movement of a cutting tool bit, and the cutting tool bit; the wire fixing sleeve is connected with the main machine through a rotating mechanism; the multidimensional work bench is fixed on the wire fixing sleeve; the cutting tool bit is arranged on the multidimensional work bench and comprises a cutting motor and a cutter head; the power supply and the controller are connected with the rotating mechanism and the travelling mechanism through signal wires; and the multidimensional work bench is connected with a signal control end of the cutting motor through a control motor. According to the multidimensional removal device, manpower can be replaced for travel and operation on the wires, and the multidimensional angle of the tool bit can be adjusted, so that the operation of cutting and removing the fittings at optimal position and angle is achieved and the wires are not injured.