Abstract: The BaTiO₃@Cu core-shell composite particles were prepared by simple one-step method using BaTiO₃ microspheres with an average size about 500 nm as based shell. The structure, component, morphology, surface chemical elements, dielectric and magnetic properties of the BaTiO₃@Cu core-shell composite particles were characterized by SEM, TEM, XPS, dielectric analyzer and impedance analyzer. The BaTiO₃ and BaTiO₃@Cu particles were dispersed into gelatin hydrogel elastomers cured with/without an electric, magnetic or electromagnetic field in order to measure the storage modulus of the elastomers and investigate the electro, magneto and electromagnetic response properties of the particles in the gelatin hydrogel elastomers. The results show that the composite particles present excellent core-shell structure with good electro and magneto response. On the surface of the composite particles, the Cu(0) accounts for about 90at% of the total Cu element. It is indicated that BaTiO₃@Cu core-shell composite particle is a new type of multifunctional smart material responding to applied electric and magnetic field, and compared with the bare BaTiO₃ particles, the electromagnetic response performance of the BaTiO₃@Cu composite particles is obviously improved.