Matlab　is　the　most　widely　used　scientific　engineer　and　computing　software,　especially　in　terms　of　matrix　calculation　is　second　to　none.　Matlab＇s　GUI　(also　known　as　the　graphical　user　interface)　is　a　simple　and　intuitive　user　interface　computer,　VC　and　other　programming　languages,　which　are　use　object-oriented　techniques.　Based　on　the　table　flatness　validation　of　studying　on　the　use　of　Matlab　powerful　matrix　computing　power　and　GUI　programming　interface,　designed　based　on　MATLAB/GUI　workbench　flatness　calibration　tool　system　to　achieve　a　flatness　table　verification,　the　result　of　intuition,　and　accurate　has　been　widely　used　in　the　production　of　mechanical　parts　processing,　which　greatly　improved　production　of　efficiency.