Abstract: The high frequency underwater curved transducer array mainly applied in multi-beam image sonar as a wide beamwidth project. By using theoretical formula, the directivity of the high frequency curved transducer array is calculated and the directional characteristics analyzed. A high frequency underwater curved transducer array has been developed, which has a large central angle in the horizontal direction. The curved array is made of 1-3 type of piezo-composite material. Its transmitting voltage response is 162dB, resonance frequency 440 kHz, and the horizontal and vertical beamwidths are 107o(-5dB) and 26o(-3dB) respectively.