We investigated the high dielectric constant and energy storage density for the blends of P(VDF-TrFE) copolymer and P(VDF-TrFE-CFE) terpolymer. The degradation of coercive field (E-c) and remnant polarization (P-r) of the copolymer under an electric field of 125 MV/m was observed and the copolymer changed into a typical relaxor ferroelectric with doping of terpolymer. The dielectric constant of P(VDF-TrFE) was found to be approximate to 11, but was enhanced to approximate to 55 by blending with P(VDF-TrFE-CFE) at 60 wt%. Consequently, a higher energy density of about 4.2 J/cm(3) was obtained in these blends in contrast to about 3.6 J/cm(3) in the terpolymer at the very low applied electric field of 125 MV/m. These results demonstrate the promise of blend approaches for tailoring and enhancing the dielectric properties of ferroelectric polymers. POLYM. ENG. SCI., 55:1396-1402, 2015. (c) 2015 Society of Plastics Engineers