It is one of the important issues in high-dimensional,twodimensional(2D)or three-dimensional(3D),Cartesian geometry to preserve perfect one-dimensional(1D)spherical symmetry.Following the idea of Caramana et al.[2],a symmetry preserving support-operators diffusion discretization scheme in 3D Cartesian geometry is developed.Spherically symmetrical flux is realized in numerical simulation of 1D symmetrical problem in 3D Cartesian geometry.Some numerical tests are given to prove the developed symmetrical schemes.