Double-layer shield shell connecting structure

The utility model provides a double-layer shield shell connecting structure. The connecting structure comprises a movable sleeving part arranged at the connecting end of an outer shell of two adjacent shield shells and a sealing connecting assembly arranged at the connecting end of an inner shell of the two adjacent shield shells, the sealing connecting assembly comprises a connecting steel plate and a sealing air bag, and the connecting steel plate is located on the inner side of the movable sleeving part of the outer shell; the front end and the rear end of each connecting steel plate are tightly attached to the inner walls of the inner-layer shells of the two adjacent shield shells correspondingly, sealing cavities are formed between the front end and the rear end of each connecting steel plate and the movable sleeving parts of the two shield shells, the front end and the rear end of each connecting steel plate are connected with the inner-layer shells of the two shield shells through connecting frames and