Solid rocket engine connected through clamping ring

The invention relates to the field of solid rocket engines, in particular to a solid rocket engine connected through a clamping ring. The solid rocket engine comprises a front end socket, a combustion chamber shell, a sealing ring and the clamping ring. The combustion chamber shell is provided with a clamping ring groove, a first matching step and a second matching step. The radial face of the second matching step is provided with a combustion chamber shell tooth opening groove and a combustion chamber shell tooth opening. The front end socket comprises a front end socket body and an extension shaft, and the inner end face of the extension shaft is provided with a concave front end socket tooth opening groove and a front end socket tooth opening. The extension shaft is sleeved with the sealing ring, the front end socket is inserted into the combustion chamber shell, the sealing ring is compressed to the position between the inner side face of the front end socket body and the radial face of the first matching