The utility model relates to a junction box technical field is a prevent cable damage junction box, including wiring box, terminal box, cable pillar and cable sheathing, operation window is established to the front side of wiring box, is equipped with the chamber door that can open and shut on the wiring box of corresponding operation window position, having the terminal box at the internal fixedmounting of junction box, corresponding the internal division board that is equipped with of junction box of terminal box below position, establish wire -passing through hole on the division board, the cable pillar from the external side of junction box is worn to the internal lower extreme that is equipped with of junction box below the division board. The utility model discloses can be at cablepillar when the base subsides everywhere, the upper end of cable pillar still the suit in the threading cover outside to it is spaced apart with the cable conductor with the top of cable pillar, prevent that its insulating layer to the cable conductor from causing the damage, the terminal box is located the division board top because the cable pillar is located the division board below simultaneously, can avoid its fish tail terminal box like this, effectively prevents electric power accident's emergence, ensures the stability of circuit operation.