Since an integral imaging display system has limited depth of field, the reconstruction depth of 3D image should be considered in the acquisition and generation processes to make sure that the reconstructed 3D image is within the depth of field of the integral imaging display system. When the reconstruction depth of 3D image does not match the depth of field of the display system, the capture parameters need to be adjusted to display clear 3D images. In order to avoid re-acquisition of 3D scene and improve the utilization efficiency of elemental image array, this paper proposed a generation method of elemental image array for different reconstruction depths. This method can change the sampling interval of light field by adjusting the pitch of elemental image and the parallax value between adjacent elemental image, so that the elemental image array can be adapted to integral imaging display systems with different depth of field and improve the practicability of elemental image array. Experimental results show that the proposed method can achieve 3D image reconstruction with different reconstruction depths and verify the correctness and feasibility of the proposed method.