结构产生器是有机化合物结构自动解析专家系统的核心部分,它从分子式出发,穷举生成结构基元向量,结构片断向量,最后对接成整体结构。本文详细介绍了ESESOC-Ⅱ(Expert System for the Elucidation of the Structures of Organic Compounds)系统的结构基元和结构片断的定义,并阐述了如何利用组合数学原理从分子式出发穷举生成结构基元向量和结构片断向量及结构片断集的算法。 The structure generator is the core part of the expert system of automatic structure analysis of organic compounds. Starting from the molecular structure, the structure generator exhaustively generates the vector of structure primitives and the structure fragment vectors, and finally connects them into the whole structure. In this paper, the definitions of structural motifs and structure fragments of ESESOC-Ⅱ system are introduced in detail, and how to combine the mathematical principles to exhaustively generate structural element vectors and Algorithm of Structure Fragment Vector and Structure Fragment Set.