Abstract: The“three deeps”(deep space,deep sea,and deep earth)are rich in mineral resource reserves and are important new territories for future resource development.This article introduced the composition and distribution of the“three deeps”mineral resources,described the domestic and foreign demands,strategies and plans for the de⁃velopment of the“three deeps”mineral resources,and revealed the environmental characteristics of the“three deeps”and the challenges for mineral enrichment and metal extraction.This paper reviewed the mining and utilization tech⁃nologies of current research status of“three deeps”metal mineral resource.Based on the technical prototypes of “three deeps”metal mineral resources mining,mineral processing,metallurgy and other related technologies proposed by predecessors,it is pointed out that in the future development of“three deeps”metal mineral resources,environmen⁃tal protection should be placed in a prominent position to prevent deep space pollution,deep ocean pollution,and deep underground pollution,to control environmental disturbance at a low level,to realize green mining,clean benefication and metallurgy,and low carbon production.This paper proposed a greening technology path,which in turn led to the proposal of future“green mine construction in deep underground/sea/space”.