The utility model discloses a bottle plug lid for bottle tank container, the lasso that includes the cock body and cup joint on the cock body is constituteed, the cock body includes cap, lower cap and lies in the connecting portion between cap, the lower cap, the lasso includes a both ends equal open -ended drum bag, drum bag opening part all is provided with integrative sealing washer, the sealing washer with connecting portion interference fit. The utility model discloses the supporting lasso that has special material to make that has set up on the lid, this lasso external drum design, when imbedding the container with the lid, the lasso receives the extrusion and produces deformation, and the lasso plays sealed effect because of hugging closely at the container inner wall toward outer reaction tension, and when the lid was taken out, the lasso reconversion can reach used repeatedly for traditional metal lid to and the lid takes out convenient mesh.