This book, as a training textbook for construction crane signalman, one of the special operators in construction, closely focuses on the relevant provisions such as Regulations on Management of Construction Special Operators, Safety Technology Assessment Outline for Construction Special Operators (Trial) and Safety Operation Skills Assessment Standard for Construction Special Operators (Trial), and explains the safety technology knowledge and skills that construction crane signalman must master. This book has six chapters. Including basic theoretical knowledge, common lifting rigging and spreader, common lifting machinery, preparation of lifting scheme and construction management, lifting operation and lifting command signal. This book aims at the characteristics of signalmen in construction lifting companies and follows the principles of scientificity, practicality and applicability. The content is concise, the language is easy to understand, the form is illustrated, and it is systematic, authoritative and operable.