用化学键参数构筑多维特征空间并结合偏最小二乘方法，对９个二元熔盐系相图中间化合物的形成规律进行了总结和分析．讨论的体系包括同阴离子系ＭｅＸ２Ｍｅ′Ｘ２，ＭｅＸ２Ｍｅ′Ｘ３，ＭｅＸ２Ｍｅ′Ｘ４，ＭｅＸ３Ｍｅ′Ｘ３，ＭｅＡＸＢＭｅ′ＣＸＤ，ＭｅＮＯ３Ｍｅ′（ＮＯ３）２，Ｍｅ２ＳＯ４Ｍｅ′ＳＯ４，同阳离子系ＭｅＸＭｅＸ′，ＭｅＸＭｅ２Ｘ′．此外，用结构化学理论对所得到的半径验判据进行了较为合理的解释． The chemical bond parameters were used to construct the multidimensional feature space and the partial least squares method was used to summarize and analyze the formation of intermediate compounds of nine binary phase diagrams. The systems discussed include the same anions MeX2Me’X2, MeX2Me’X3, MeX2Me’X4, MeX3Me’X3, MeAXBMe’CXD, MeNO3Me ’(NO3) 2, Me2SO4Me’SO4, the same cationic MeXMeX’, MeXMe2X ’. In addition, using the theory of structural chemistry, the obtained criterion of the radius is explained more reasonably.