The invention discloses a closing gate defense device of a high-
voltage distribution box and a closing gate method of the closing gate defense device. The closing gate defense device of the high-
voltage distribution box comprises a hinge box installed on a box door of the high-
voltage distribution box. Comprising an insulating and
flame-retardant inner side lever; an inner
bevel gear is arranged at one end of the inner side lever, and the circle center of the inner
bevel gear is hinged into the hinge box; the other end of the inner side lever is hinged with a closing operation
handle in the high-voltage distribution box through a connecting piece, and comprises an insulating and
flame-retardant outer side lever; an outer
bevel gear is arranged at one end of the outer side lever, the circle center of the outer bevel gear is hinged to the interior of the hinge box, and the outer bevel gear is meshed with the inner bevel gear; the other end of the outer side lever extends towards the rear side of the high-voltage distribution box body, the outer side lever is pulled upwards in the longitudinal direction, and the inner bevel gear is driven to rotate through the outer bevel gear. According to the invention, the
impact force generated by electrical explosion is guided to the right front side or the lateral front side of the box body, so that the casualty probability is greatly reduced, and the safety level of switching-on operation is improved.