Elastic supporting and fixing structure and bottle cap with same

The utility model discloses an elastic supporting and fixing structure which comprises a shell, a fixing block, an inner support, a clamping ring and an elastic piece. The shell comprises an annular shell body and a cover body covering one end of the shell body. The fixed block is arranged on the inner wall of the shell; the inner support is arranged in the shell and comprises a first support bodyand a second support body, and the clamping ring is arranged on the outer wall of the inner support and abuts against the fixing block; the elastic piece is arranged to be in a sheet shape and arranged at the joint of the inner support and the cover body, and the inner support abuts against the cover body through the elastic piece. The utility model further discloses a bottle cap which is provided with any elastic supporting and fixing structure. By means of the mode, clamping and fixing are achieved through the clamping ring and the fixing block, gradual deformation caused by interference fit is avoided in the long-