The alaskite- type uranium deposits of the R?ssing area, Namibia occur inside and outside the interface of D and E type alaskite and metamorphic rocks, where they orientate at the edge of dome of alaskite and Damara metamorphic rocks, and are also deposited within the weak sites such as schistosity, foliation, fold and transition position etc. The ages of uraninite of alaskite- type uranium deposits in target area rangebet ween 494~508Ma which is the time of re- melting of D and E type alaskite and ductile shear metamorphosis. The uranium deposits occurring inside the alaskite rocks mainly consist of uraninite, thor- uraninite, and brannerite at main ore- forming stages, with granular texture and disseminated structure, and with same mineral structure as its associated minerals as zircon and monazite, all of which indicate the genesis of magmatic crystallization differentiation. U- Pb isotope tracing indicates uranium re- sourcing from A，B and F alaskite and Damara metamorphic base rocks. The uranium- bearing rocks of D and E alaskite were re- meltedfrom the Damara base and formeralaskite rocks. The alaskite- type uranium deposits were first sourced from uranium pre- enrichment of magmatic crystallization differentiation during partial re- melting of granitic and metamorphic base rocks at the time of Damara Orogen movement, and then mineralized to uranium deposits from re- meltingof alaskite rocks under ductile shear metamorphosis movement during post periods of the Damara Orogen movement in the R?ssing area, Namibia.