The conductive composites of silicone filled with nickel were prepared, with a low percolation threshold of around 35 vol%. AC and DC conductivity of nickel/silicone composites with the filler content below or around percolation threshold were studied under uniaxial pressure. A pressure-induced percolation appeared at a very low pressure of finger-sensitive range (0.1-0.7 MPa) for each DC conductivity curve. The linear dependence of log sigma(DC) on p(-1/3) at selected pressures proved the existence of tunneling mechanism and the potential barrier height for electron hopping in metal/polymer composite is strongly pressure dependent. The AC conductivity and the dielectric permittivity of the composite under different uniaxial pressures satisfies the universal dynamic power law, sigma(AC) proportional to omega(x), epsilon proportional to omega(-y) , respectively. The critical exponents show that the frequency dependence of AC conductivity and dielectric permittivity of metal/polymer composite under various pressures could be well described by polarization effects. (C) 2014 Elsevier Ltd. All rights reserved.