本文从信息论中的“自信息”这一概念出发阐释强调型极量极性词的敏感性特征,把基于量值的极性词的梯级模型拓展为基于概率的极性词的梯级模型,并作了两点补充:用函数的单调性区分相同量级的极性词,对极性词的不合适用法的成因提出新的解释方法。 Based on the concept of “self-information ” in information theory, the paper expounds the sensitivity characteristics of the emphasized polar words, and extends the step model of the polar word based on magnitude to the step model of the polar word based on probability , And makes two additions: the monotonous function is used to distinguish polar words of the same magnitude, and a new explanation method is given for the causes of the inappropriate usage of polar words.