The utility model discloses a novel bottle cork, wherein, novel bottle cork includes: go up briquetting, lower briquetting, set up and be in go up elastic expansion layer and lead screw between briquetting and the lower briquetting, the lead screw with go up briquetting and briquetting connection down, thereby rotatory pulling changes go up the gap width between briquetting and the lower briquetting, elastic expansion follows on the layer it pushes inflation or elasticity and returns and contract to go up the briquetting with the clearance width variation of briquetting down. Utilize the briquetting extrusion to make the inboard closely pressfitting of flexible glue inflation and beverage bottle accomplish the sealed of bottle plug and open for the bottle plug can use by manifold cycles, and convenient to use is swift.