A kind of method for sealing a bottle according to the present invention includes the following steps: to provide a cage, one sealing element stopper and a capsule, in conjunction with a stopper of a cage of the sealing assembly for obtaining an assembled in advance and a cage of a capsule (300) and air-tight bottle, by bottle and applying and being aligned sealing assembly on stressed mouth. In the present invention, the annular relief part of cage is contacted with bottle before stopper is with bottle contact. (figure
