A plug cover structure (2) for cultivating mushroom space bags, which includes an inner liner ring, an inner plug seat and an outer cover, wherein the inner plug seat is provided with a plurality of positioning holes in the combined ring part , And the outer cover is provided with a plurality of positioning ribs corresponding to the outer diameter of the combined ring portion, thereby fixing the outer cover not only to the inner plug by the corresponding positioning perforations and the positioning rib latches The combination without rotation will not affect the shape of the non-woven fabric, so that the non-woven fabric provided between the inner liner ring and the inner plug seat can be laid on the abutment part smoothly, and the humidity control and pollution prevention effects are indeed preserved , To achieve the purpose of improving the growth quality of mushrooms.一種用於培育菇類太空包之塞蓋結構(二)，其包含一內襯環、一內塞座以及一外封蓋，其中，該內塞座係於組合環部設有複數該定位穿孔，而該外封蓋則在組合環部外徑對應設有複數該定位凸肋，藉此透過相對應的定位穿孔以及定位凸肋卡掣固定，令該外封蓋不僅能確實固定於內塞座上，且不帶旋轉的組合方式不會影響不織布的型態，讓上述內襯環以及內塞座間設置的不織布能平整地鋪設於抵靠部上，確實保有濕度控管以及阻隔污染的功效，達到提升菇蕈生長品質的目的者。
