Abstract: Cu(NO₃)₂ was deposited into the nano-channels of mesoporous SBA-15 using the supercritical fluid deposition (SCFD) method at a pressure of about 20 MPa and a temperature of 50℃，where supercritical CO₂ was employed as the solvent and ethanol as the cosolvent. The subsequent reduction of this composite (Cu(NO₃)₂/SBA-15) led to copper nanowires and/or nanoparticles dispersed in the channels of SBA-15. The resultant Cu/SBA-15 composites were characterized by means of TEM and XRD. The results showed that Cu nanowires with the mean diameter 6 nm grow and curve along the channels of SBA-15 and their lengths vary from several nanometers to several micrometers；while the Cu nanoparticles with sizes of ～ 3 nm are highly dispersed in the channels. Moreover，it is found that with proper cosolvent，inorganic metallic can be solved in supercritical CO_2，and the morphology of copper can be controlled by changing the experimental conditions.