提出一个已知分子式求包含直链和支链的全部饱和无环多元醇的异构体计数方法 ,并给出一致的母函数形式。文中采用图论中根树计数的方法 ,并结合采用逐一排除的方法从计数母函数中排除不符合醇的结构要求的项 ,求出多羟基烷基的计数母函数 ,进而求出多元醇的构造、构型和非手性构型计数母函数。并通过计算机求出部分结果 ,用表格形式给出。 A known molecular formula for the isomer counting of isomers containing both linear and branched fully saturated acyclic polyols is proposed and a consistent form of the parent function is given. In this paper, the root-tree counting method is used in the graph theory, and the counting non-conforming terms are excluded from the counting mother function by the method of eliminating one by one to calculate the counting parent function of the polyhydroxyalkyl group, and then the structure of the polyhydric alcohol , Configuration and achiral configuration count parent functions. And through the computer to find some of the results, given in tabular form.