Abstract: In this paper, the near-far radiation sound field of uniform piston transducer array is studied. Firstly the sound field theory of uniform cylindrical point source array is established according to the principle of point source acoustic interference, then the expression of the near-far radiation sound field of uniform piston transducer array is deduced, and the near-far field directivity is simulated by Matlab. The radiation sound field pattern of near-far field, the variation of sound pressure in the sound axis direction and the variation of side-lobe levels are analyzed. The near-far radiation sound field of the prepared uniform piston transducer array of 80 kHz is measured. By comparison, it is shown that the measured results are basically consistent with the simulation results. The theory and measurement method in this paper are proved to be feasible and can guide the actual measurement work.