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Silver nano-particles with average diameter of about 60 nm were compacted in a high-strength mold under different pressures at 523 K to produce nano-structured Ag solid materials.The structure and characteristic of the nano-structured Ag solid materials (NSS-Ag) were studied using X-ray diffraction (XRD),scanning electron microscope (SEM) and Raman spectrometer.The NSS-Ag could be used as highly efficient surface-enhanced Raman scattering (SERS) active substrates.The common probe molecules Rhodamine 6G (R6G,1 × 10-10 mol/L) were used to test the SERS activity on these substrates at very low concentrations.It is found that the SERS enhancement ability is dependent on the density of NSS-Ag.When the relative density of NSS-Ag is 83.87％,the materials reveal great SERS signal.