This monograph aims to provide theoretical and technical support for construction safety risk assessment in the construction of urban underground large space, since high construction risks and safety accidents frequently occurs in the current development of complex underground spaces in urban areas. The author's team completes the statistical analysis on a large number of typical engineering instances and related accident cases, and proposes the definition of "urban underground large space" and corresponding risk analysis methods. This book starts with analyzing the safety risk characteristics during construction period of urban underground large spaces and establishes a coupling evolution analysis model, then proposes an index system and the quantitative criterion for construction safety risk assessment in urban underground large space, and lastly constructs a dynamic evaluation system on construction safety risk. The book will be an valuable reference for professional engineers, researchers, teachers, and students with an interest in the construction and management of underground spaces. The basis of English translation of this book, originally in Chinese, was facilitated by artificial intelligence. The content was later revised by the authors for accuracy.