本文给出JEM-200cx实现会聚束电子衍射的方法:利用会聚束电子衍射花样中的菊池花样测定了晶体的小角度位向差。并绘制出几种晶体的菊池图,对衍射斑点的自恰标定和物相鉴定亦做了探讨;利用衍射花样中的高阶劳埃环测定晶格常数,其结果准确、方法直观、简便。 In this paper, a method of converging beam electron diffraction (JE-200cx) is proposed. The small-angle orientation difference of the crystal is determined by the Kikuchi pattern in the convergent beam electron diffraction pattern. The Kikuchi map of several kinds of crystals was drawn, and the self-calibration and phase identification of the diffraction spots were also discussed. The lattice constant was determined by the high-order Lyle’s rings in the diffraction pattern, and the results were accurate and the method was intuitive and simple.