Abstract: Following the concept of "geology is the foundation, shield the key, and people (technology and manage? ment) the root" in shield tunnelling technology decision-making, risks in the process of the survey, design, shield selection and configuration, as well as construction are analyzed for extra-large diameter shields driving in composite strata, mainly including three typical rock groups of granite, limestone and clastic rock as the dominant matrix. And the relevant targeted solutions are put forward. It elaborates on the current status and challenges of the construction technology of extra-large diameter composite shields and makes an outlook on the future development of extra-large diameter composite shields in China, which is of significant guiding implications.