The utility model relates to a stop valve of an infusion container, which comprises a ring body and a diaphragm.The ring body includes a body and a convex block.The diaphragm consists of a ring and a spherical structure.The convex block is embedded in the ring concave on the outer circumference of the ring, and the ring body and the diaphragm enclosure are connected with the upper and lower ring grooves of the floating hole； or the convex block's column body is connected with the through hole of the ring, the bottom end of the column head forms a gap with the top surface of the ring, and the ring body and the diaphragm enclosure are connected with the upper ring grooves of the floating hole.Therefore, the convex arc surface, concave arc surface or suction cup of the spherical structure close the water outlet of the infusion container； the upper and lower ring grooves contain gas and prevent the rough edge of the ring from entering the floating hole, so as to improve the buoyancy； the weight is light, the proportion of the ring body is smaller than that of the water, and the floating effect is good； when the infusion container is inclined, the diaphragm can move relative to the ring body to close the water outlet； no matter how the liquid impacts, the diaphragm will not fall off Out of the loop body.一種輸液容器之止擋閥，包括環體及膜片。環體包括本體及凸塊。膜片包括環圈及球面結構。凸塊嵌設於環圈的外周緣的環凹，環體與膜片圍構與浮氣孔相通的上、下環槽；或者凸塊的柱體穿設環圈的通孔，柱體頭部底端與環圈頂面形成間隙，環體與膜片圍構與浮氣孔相通的上環槽。藉此，球面結構的凸弧面、凹弧面或吸盤封閉輸液容器的出水口；上、下環槽含氣體且防止環圈的毛邊進入浮氣孔，提高浮力；重量輕，環體比重小於水的比重，漂浮效果佳；輸液容器傾斜時，膜片可相對環體活動，以封閉出水口；無論液體如何衝擊，膜片不會脫離環體。
