Abstract: This paper involves in the preparation of Cu Ag bimetallic powders with dendritic and hexagonal morphologies by replacement method at the exist of macromolecule dispersant. These powders were characterized by TEM, XRD, et al. Anti oxidation and antibacterium of the powders were tested by TG and standard antibiosis test method respectively. The experimental results show that Cu Ag powders have good anti oxidation and antibacterium.