This paper, basing on some professional standards related with G code and Cartesian coordinatesrule, expatiatesonthe definition and proper use of G02 (G03) instruction codein CNC lathe.

• 本文基于G代码有关标准及迪卡尔坐标原则,并以数控车床为例,阐述了G02(G03)代码的严格定义及正确应用。