The metallic ore resources in the shallow crust have been gradually exhausted after undergoing continuous large-scale mining activities.In the future,the exploitation of mineral resources will take place in deep underground space.In the deep mining environment,there are many problems,such as high geostress,high depth of shaft,high ground temperature,dynamic disturbance,etc.It is urgent to develop mining technologies and techniques which are suitable for this special complex mining environment.Cemented paste backfill (CPB) technology has the characteristics of filling the mined-out stopes with no bleeding,good roof connection and high strength,and will become a reliable scheme for safe,green and efficient mining method for deep resources.This paper introduces the basic concept,technological process and technical advantages of the CPB technology,summarizes and analyzes the status and research results of backfilling in deep mining at home and abroad,discusses the technical problems that need to be solved urgently in deep backfilling,and puts forward the prospects of the application of CPB technology in deep underground.In addition,the application of CPB in deep mining is summarized in a practical way with a typical field case,namely the paste backfill system in southeast ore body of Chambishi Copper Mine in Zambia.