Based on microscope and electron microprobe techniques, this paper studies in detail the characteristics of uranium minerals of alaskite type uranium deposit in the Gaudeanmus area, Namibia. The results indicates that uranium mainly exists as independent uranium minerals, and partially exists in thorium minerals as isomorphic form. The uranium minerals are uraninite, thor uraninite, coffinite, uranothorite, brannerite, pitchblende, uranophane and carnotite. The primary uranium minerals, such as uraninite, thor uraninite and brannerite, account for about 69%, and the secondary uranium minerals, such as coffinite, uranothorite, pitchblende, uranophane and carnotite, approximately account for 31%. To sum up, uranium mineralization manifests multiplex affects of primarily magmatism and later hydrothermal reformation and hydrothermal reformation is not strongly by which uranium was merely redistributed internally in the study area.