The present invention provides a method for preparing nano metal silver by utilizing non-aqueous solution homogeneous reduction process. Said method is characterized by including the following steps: dissolving silver ion in a neutral inert solvent containing phosphorus coordination compound, besides dissolving univalent copper ion in a neutral inert solvent containing phosphorus coordination compound, then mixing both them to produce reduction reaction, the formed precipitate is the nano metal silver, filtering, washing and drying so as to obtain nano metal silver product. |