The utility model discloses an explosion -proof cable joint in dust workshop for the solution contains the sudden strain of a muscle problem of exploding in the workshop of dust. It includes that a pair of symmetry sets up and forms a casing that is used for holding joint area through the butt joint, and sets up sealed cushion in faying face department and glue with sealed, wherein, the casing includes spherical portion, flange portion and poling portion, be provided with the helicitic texture and the toper is closed up at the outer port of poling portion, and the toper is closed up and is set up in through hole end portion, wherein, the taper control that the toper was closed up is between 5 degrees to 20 degrees, and just effectual length of the inclined surface is not less than 5 centimetres, and thread bush internal thread cooperates with the external screw thread of poling department to one side being close to the outer end is provided with a binding off. The utility model discloses have and synthesize explosion -proof excellent performance, all formed good cooperation effect in flange joint department, poling junction, stop the dust and enter into insidely, be particularly useful for the serious occasions of dust such as flour mill.