This book investigates the rheology of paste in metal mines, which is beneficial for cemented paste backfill (CPB) technology. This book establishes a theory frame of paste rheology, including measurement of the rheological properties of paste, rheological behavior of full tailings in deep thickening, rheological behavior of paste in the mixing process, rheological behavior of paste in pipeline transportation, and rheological behavior of filling body. It aims to promote the development of paste theory, the innovation of CPB technology, and the research and development of CPB equipment to accelerate the construction of green mines based on CPB. This book is intended for researchers, designers, and engineering technicians. This book can also be a textbook for postgraduate students on mining engineering and other related subjects.