In this paper, the characteristic parameters with different properties are transformed into comprehensive quantified values, the deviation of characteristic parameters is defined using the interval number variable weight principle, and the teaching situation is created by combining students’ interests. The weight vector is derived from the disappointment function to assess the humanistic quality of Chinese language and literature education. Let the state vector be mapped by a variable-weight mapping, which will monotonically increase or decrease each variable continuum, reflecting the first-order change in Chinese language students' learning status. It is found that 18.66% of the first-year students in colleges and universities are familiar with humanistic quality, and the highest real-time rate is 0.9906. The principle of variable weight based on interval numbers can be used to effectively cultivate students' humanistic qualities and develop high-quality and innovative talents.