Abstract: Shield tunnels adopt bolts as the common connecting segments, which feature the advantages of simple segment production and convenient construction operation. Whereas they rise problems such as low accuracy of joint connection, weak stiffness of joint structure and difficult quality control in construction. The application of new type connectors can improve the connection accuracy of shield tunnel segments and ensure the quality of formed tunnels, in accordance with the development direction of tunneling technology. Results of research on the structural design of new type connector in metro shield tunnel, the mechanical properties tests, the segment production technology and tunnel construction technology are introduced. The field measured data in the demonstration project of Shanghai metro Line 18 show that all construction-quality indicators of the new type connector shield tunnels are significantly improved compared to those of the conventional bolt\|connecting shield tunnels, validating the feasibility of applying new connector technology system to elevate the tunnel quality upon formation.