The utility model relates to a plug structure for cultivating mushroom space bags.It includes: a lining ring,An inner plug seat and an outer cover,The upper end surface of the outer cover is provided with a through hole.The through hole is convex upward with a ring-shaped rib plate.And the upper end of the annular rib plate is integrally formed with an upper cover plate.And the annular rib plate is provided with a data channel at the same spacing.And a plurality of ribs are convex downward on the top surface of the upper shutter.In this way,In actual use,Water will be blocked by annular ribs and flow out.Only water vapor can enter between the upper shield and the outer cover through the trough of the annular rib plate.It's true that no water can enter the capsule directly.Avoid excessive moisture inside the capsule.It leads to the breeding of miscellaneous bacteria and other problems.When water and gas enter through the trough,It will be blocked by the ribs of the upper shutter and stuck.When the water vapor condenses, it will drop down through the through hole to the chamber.Then the humidity supply and control are achieved.To ensure the stability of mushroom growth.一種用於培育菇類太空包之塞蓋結構，其包含：一內襯環、一內塞座以及一外封蓋，其中該外封蓋上端面具有一透孔，該透孔往上凸設有環狀肋板，再以該環狀肋板上端一體成型有一上遮板，又該環狀肋板係以相同間距設有數通槽，而該上遮板之內頂面則往下凸設有複數個肋板，藉此，實際使用時，水分會受到環狀肋板阻隔而往外流出，只讓水氣能夠經由環狀肋板之通槽進入上遮板及外封蓋間，確實杜絕水分直接進入太空包內，避免太空包內部水份過多而受潮，導致雜菌滋生等問題，當水氣由通槽進入時，則會受到上遮板之肋板阻擋而滯留附著，待水氣凝結後即往下通過透孔滴落容室內，進而達到濕度供給及控管，確保菇類生長之穩定性者。
