The present invention discloses a 3D image capture device and a symmetric prism array for the same. The symmetric prism array comprises a plurality of right triangle prisms, wherein the longer legs of the right triangle prisms are arranged along an identical line on the incident plane, and wherein the right triangle prisms are left-right symmetric with respect to a central symmetry line, and wherein the normals of the hypotenuses of the right triangle prisms diverge from the central symmetry line. The symmetric prism array that captures light from two different directions is arranged in front of the lens of the 3D image capture device, whereby the 3D image capture device can capture images from two different directions simultaneously. After the image processing by the 3D image capture device, 3D images are presented.