Abstract: PZT ceramic array was prepared by ceramic powder injection molding. After the array was degreased, sintered, infused with epoxy resin and post processed, 1-3 piezoelectric composites with the 4 ~ 5 ratio of length to diameter were prepared and the piezoelectric properties and mechanical-electronical conversion properties were studied. The results indicated that piezoelectric constant was more than 400 pC/N, at the same level with that of piezoelectric ceramic flake. The ratio of the thickness coupling coefficient k_t to the radial coupling coefficient k_p reached about 2, higher than that of PZT ceramc.