An epoxy/polyacrylate (EP/PA) composite particles with core-shell structure was synthesized by two-stage emulsion polymerization. The high damping property was obtained by cross-linking reaction between core layer and shell layer. TEM showed that the composite particles had a spherical morphology with a core-shell structure 120nm size. Fourier transform infrared spectra (FTIR) indicated the cross-linking between EP groups in core and carboxyl groups in shell during film formation of composite particles. The cross-linking reaction improved the dynamic mechanical property by combining the core and shell polymers. DMA (dynamic mechanical analysis) results revealed that the coatings of composite latex presented a markedly loss factor (tanδ) and widen damping temperature range. The highest peak values of tanδ of the composite materials by heating formation film could reach 2.12

which exceeded the value of the traditional damping coatings. The damping temperature range (tan δ≥0.3) could reach to 40℃. It indicated that the composite material presented an obvious application potentials in the field of metal damping coatings.