The utility model relates to a cable intermediate head explosion -proof box belongs to power supply operation equipment technical field. Technical scheme is: the intermediate head storehouse is by last casing (1), go up casing two (2), lower casing (3), two (4) four casings of casing are formed down, tailor end (9) form the both ends in the intermediate head storehouse, the center directions diameter of keeping away from the intermediate head storehouse reduces gradually and forms the conical surface (8), the tip axial position of end (9) is being tailor to shrinkage cavity end (10) setting, the intermediate head storehouse, tailor end (9), shrinkage cavity end (10) coaxial setting and abutting end facial features are matchd, filler opening (6) have four, evenly set up at last casing (1), go up the upper surface of casing two (2). The beneficial effects of the utility model are that: through the adoption tailor the end with set up the structure of four filler openings, can install the arbitrary cross section cable, fully let out the ability when being favorable to the explosion of cable intermediate head simultaneously.