Abstract: In order to improve the force way of the traditional disconnectable coupling in excavation engineering to further increase its security and stability, the design and development about the new hoop-disconnectable coupling are performed. Through axial compression tests, the mechanical properties of different specimens are studied. The main conclusions are drawn as follows: (1) the stiffness of the hoop-disconnectable coupling is higher than that of the traditional one; (2) under in the same load, the displacement of the traditional is larger; (3) under normal operation, the specimens can be reused; (4) when the ultimate bearing capacity is reached, the hoop-disconnectable coupling exhibits tiny brittle failure and after slipping, and it can continue to carry; (5) due to the clamping action of the bottom bolts, when the adjustable length is short, namely the larger contact area, the carrying capacity instead decreases; (6) under the axial compression, the pretension of bolts is essentially unchanged.