The fabrication method of sphericity nanoporous metal silver powders by nanosilver powders is described in the present paper. In this technique, a chemical deoxidize deposited way is used by taking N2H4.H2O as deoxidizer, the nanosilver powders are prepared by deoxidized silver ions which are protected by the dispersant and the home-made organic mixed solution. The silver ions concentration, the dispersant adding amount, and the organic mixed preparation are 10~40 g/L, 1.5~3 g/L, and 60 g/L, respectively, in the solution, then the reduction reaction is finished instantly with a nanosilver granularity of 10~20 nm. The nanosilver powders are conglomerated to sphericity nanoporous silver powders under controllable conditions, fast separated from the solution by deposited. The morphology was studied using a JEOL JSM-6400 FESEM, the results show that the sphericity nanoporous silver powders granularity is 40 ~80 μm. The specific surface area of the nanoporous silver powders is more than 16 m2/g measured using a Micromeritics ASAP 2020, and its pore channel has a very high penetration, different from the traditional microminiature silver powders.