The 1-3 piezoelectric composites have great significance for the development of high-performance piezoelectric transducers due to its excellent electromechanical coupling properties. The 1-3 PZT/E-poxy composites with different structural parameters are fabricated by low-cost dice-fill process, and the piezoelectric properties, electromechanical response characteristics and temperature stability are systematically studied combined with the finite element simulation method. The 1-3 array structure produces a large attenuation of plane strain, which cause more concentrated energy in the thickness resonance mode. The aspect ratio of composites is the main factor affecting the electromechanical coupling performance, and the finer array structure is beneficial to the fabrication of high-performance piezoelectric transducers. The 1-3 piezoelectric composites show excellent temperature stability in the common temperature range from -20 ℃ to 60 ℃, while the thickness electromechanical coupling coefficient remains at about 0.61 with the change rate less than 1%.