Several kinds of activated carbon fiber（ACF）, Granule Activated carbon（AC） containing silver ion or fine silver particle(Ag-ACF/AC) have been prepared by soaking ACF or AC in the salt solution of silver. Ag, AgCl and AgI compounds have been loaded onto the fibers. The structure of the fibers was measured by scanning electron microscopy (SEM) and powder X-ray diffraction (XRD). The Ag content in the fiber was obtained by an Atomic absorption spectroscopy (AAS). The Ag+ content in water after the antibacterial test was measured by an Inductively Coupled Plasma (ICP) emission spectroscopy. Antibacterial test was carried out against Escherichia coli (E.coli) and Staphylococcus aureus (S.aureus). The results show that Ag-ACF/AC have strong antibacterial activity against E.coli and S.aureus. After dealt with ACF/AC loading Ag, AgCl, AgI, no E.coli and S.aureus alive in solution can be detected. The analysis of Ag content in water after antibacterial test showed that the content of Ag meet the quality requirement of the National Potable Water Standard. It is indicated that ACF/AC-Ag in this experiment would be a safe antibacterial agent . Several kinds of activated carbon fiber (ACF), Granule Activated Carbon (AC) containing silver ion or fine silver particle (Ag-ACF / AC) have been prepared by soaking ACF or AC in the salt solution of silver. Ag, AgCl and AgI The structures of the fibers was measured by scanning electron microscopy (SEM) and powder X-ray diffraction (XRD). The Ag content in the fibers was obtained by Atomic absorption spectroscopy (AAS). The Ag + content in water after the antibacterial test was measured by an Inductively Coupled Plasma (ICP) emission spectroscopy. Antibacterial test was carried out against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The results show that Ag-ACF / AC have strong antibacterial activity against E. coli and S. aureus. After dealt with ACF / AC loading Ag, AgCl, AgI, no E. coli and S. aureus alive in solution can detected. The analysis of Ag content in water after antibacterial test showed that the content of Ag meet the quality requirement of the National Potable Water Standard. It is indicated that ACF / AC-Ag in this experiment would be a safe antibacterial agent.