This article proposed a new kind of one dimensional linear array taking array element with the plano concave cylinder transducer. The plano concave cylinder transducer was linear arranged to be a linear array. Numerical model of sound field of element and array were established. Study on the effect of array parameter to its sound field distribution and the sound beam control was finished. The numerical analysis and the simulation of the sound field were carried on. It′s found that the directivity in the array element length direction was influenced by the element length, which could be done through the adjustment of array parameter in the width direction. Sound field of the array showed a focusing character on the condition of with no control of array element, and the radiation direction of the beam and the focus zone could be controlled through the stress phase of the element. This kind of array could be used to non destructive test with less change of the detection depth.