The invention discloses a single conductor splicing sleeve. The single conductor splicing sleeve comprises a tube body and a locking part which is threaded to the tube body, wherein a pipeline throughwhich a wire can pass is arranged in the tube body; three-claw chucks are integrally arranged at two ends of the tube body; an outer wall of a middle part of the tube body is sleeved with a first nutintegrally; outer walls of the three-claw chucks are provided with first threads; the tube body is further provided with symmetrical second threads; an outer wall of a part of the tube body between the second thread and the positioning nut is provided with a plurality of positioning circular slots; the locking part comprises a second nut and a conical nut which is integrally arranged at a side end of the second nut; the second nut is provided with a positioning bolt which is vertical to the tube body; and one end close to the tube body of the positioning bolt is configured into a conical tip.The single conductor splicing sleeve has the advantages of simple structure, convenience in operation, capability of greatly improving the production efficiency, high controllability, and no damage to cable steel cores and the splicing sleeve.