The high-frequency medical ultrasonic imaging technology has been widely used in the observation of fine structures with human tissues due to its high spatial resolution, and 1-3 piezocomposite are the core of high-frequency ultrasonic transducer. The PZT ceramic micropillar array was sintered by the soft mold process to fabricate the PZT/epoxy 1-3 piezoelectric composite, and the microstructure observation and electrical properties characterization were carried out. The microstructure is complete and the electromechanical coupling coefficient reaches 0.64. A high-frequency ultrasonic transducer with center frequency of 20 MHz was designed and fabricated based on the prepared piezocomposite. The performance and the sound field of the transducer were tested by pulse echo method, and the ultrasonic imaging for the skin of human was carried out. The insertion loss and bandwidths of the transducer were 13.1 dB and 84.2%, respectively. It is indicated that the 1-3 piezocomposite via the soft mold process can make high-frequency ultrasonic transducer with low insertion loss and large bandwidth, which provides a low-cost and high-efficiency commercial way for the high-frequency medical ultrasonic transducers.