Totally-closed ventilation device for stone yard plant

The utility model discloses a totally-closed stone yard plant ventilation device which comprises a stone yard plant top plate and alignment plates installed on the two sides of the bottom of the plant top plate, and ventilation type dust suppression mechanisms are installed on the inner sides of the alignment plates. An automatic ventilation mechanism extending to the top of a top plate of the stone yard plant is arranged in the center of the inner top of the ventilation type dust suppression mechanism and electrically connected with a control unit in the stone yard plant. According to the ventilation device for the totally-closed stone yard plant, through the design of internal parts of the automatic ventilation mechanism, enough air can be provided for the interior of the totally-closed stone yard plant, so that workers in the totally-closed stone yard plant can smoothly carry out ore mining operation, and meanwhile, by matching with the design of internal parts of the alignment mounting mechanism and the d