This　paper　focus　on　orthogonal　design　of　a　small　gas　burner　which　burns　clean　gas　fuels　such　as　natural　gas　(methane),　hydrogen.　In　order　to　optimize　the　structure　of　the　gas　burner,　several　burners　with　different　sizes　are　presented　and　discussed　in　this　paper,　by　comparing　the　Computational　Fluid　Dynamics　(CFD)　simulation　results　of　the　combustion　characteristic　basing　on　the　orthogonal　design　method.　The　burner　structure　is　optimized　basing　on　the　CFD　simulation.　The　CFD　simulation　results　show　that　the　optimized　burner　gets　the　better　performance　and　higher　temperature　at　the　outlet　than　other　structures.　©　2011　IEEE.