Intermediate connector of single core cable

The utility model an intermediate connector of a single core cable, which is used for connecting two sections of mineral insulated (MI) cables (1), wherein each MI cable (1) comprises a core wire conductor (6), a copper sheath (7) and an insulation layer between the core wire conductor and the copper sheath. The connector comprises the core wire conductors which are connected together in a welded way or through a compression joint pipe (5), and further comprises a copper sleeve (3) sleeving the core wire conductors (6); the outer layers of the MI cables (1) are the copper sheaths (7); copper wrappers (2) used for positioning the copper sleeve (3) are arranged between the copper sheaths (7) and the copper sleeve (3); and the copper sleeve (3), the compression joint pipe (5) or the core wire conductors (6) form a cavity in which mineral insulated powder is filled. The connector and the MI cables can survive in the 950 DEG C flame for 3 hours.