Abstract: The cylindrical transducer array has been widely used in underwater acoustic detection due to its horizontal non-directivity. A broadband cylindrical transducer array is studied in this paper. The bandwidth of each array element of the cylindrical transducer array is broadened by matching layer technology, and the parameters of the element, such as bandwidth, transmitting voltage response and impedance are optimized by finite element simulation. The cylindrical transducer array is formed by dislocated arrangement of array elements through simulation, at the same time the number and arrangement of array elements are optimized. A broadband cylindrical transducer array with a diameter of 400 mm and a height of 435 mm is developed and measured. The operating frequency band of the cylindrical array is 20-30 kHz with an internal fluctuation of 3 dB, a maximum transmitting voltage response reaches 160.5 dB, and the -3 dB horizontal beamwidth is 360°.