The 3-3 piezoelectric composites are widely used in ultrasonic sensors, underwater acoustic detection and other fields. The lead zirconate titanate(PZT) ceramics are expected to prepare the composites with the advantages of low dielectric constant and low brittleness. The PZT that has three-dimensional wood pile structure support is prepared by direct ink writing technology and combined with epoxy resin filled by impregnation method, the 3-3 PZT/epoxy piezoelectric composites are prepared. The effects of the ceramic phase volume fraction on the dielectric, piezoelectric and ferroelectric properties of 3-3 PZT/epoxy piezoelectric composites are studied, and the dielectric and piezoelectric properties of PZT ceramic support and PZT/epoxy composites are compared. With the increase of the volume fraction of ceramic phase, the dielectric constant, piezoelectric constant and residual electric polarization of the composites increases, and the PZT support has higher dielectric constant, piezoelectric constant and piezoelectric voltage constant. When the volume fraction of ceramic phase is 36%, the piezoelectric voltage constants of PZT support and PZT/epoxy are up to 151 mV·m/N and 104 mV·m/N, respectively. The PZT/epoxy composites have the advantages of hardness and electrical properties of piezoelectric ceramics, as well as flexibility and low density of polymers, and have a good application prospects.