Explosion-proof junction box

The utility model relates to an explosion-proof junction box. Comprising a cuboid junction box shell with a round window in the middle of the front face, a window boss with an annular sealing ring groove in the front end face is installed in the window, a sealing ring is arranged in the annular sealing ring groove, and a junction box front cover is installed on the window boss; a mounting substrate is mounted on the rear side wall of the shell inside the junction box shell by adopting a plurality of adjustable connecting pieces, two sliding rails are mounted in parallel at the front part of the mounting substrate, and inner wiring terminals are mounted on the sliding rails; a plurality of lead-in cable explosion-proof stuffing boxes are arranged on the side wall of the junction box shell, and a plurality of lead-out cable explosion-proof stuffing boxes are arranged on the bottom wall of the junction box shell; the direction of the center line of each lead-in cable explosion-proof stuffing box is perpendicular