本文根据液体分子理论和对比态原理,提出了反映物质结构、分子间相互作用及极性和缔合性的物质特性参数——构形因子、内压因子和极性因子.这些因子和目前已有的特性因子,如偏心因子ω和Stiel因子X等相比,其物理意义比较清晰、规律性较好,而且数值范围也适宜,初步应用的效果令人满意. In this paper, based on the theory of liquid molecules and the principle of comparative states, the physical properties parameters, such as configuration factor, internal pressure factor and polarity factor, which reflect the physical structure, intermolecular interaction and polarity and association are proposed. Some of the characteristic factors, such as eccentric factor ω and Stiel factor X, compared to its physical significance is relatively clear, regularity is good, and the numerical range is also appropriate, the initial application of satisfactory results.