A high dielectric constant polymer composite system is presented. The new composite uses a high dielectric constant cyanoresin polymer filled with ferroelectric ceramics, such as BaTiO 3 powder. While dielectric constant of the polymer is 21 at 1 kHz, the dielectric constant of the composite is over 130 at the BaTiO 3 volume fraction of 51%, which is the highest dielectric constant reported so far for the polymer composite materials based on BaTiO 3 filler. Frequency and temperature dependence of the dielectric constant of the composites are reported.