By establishing the multi-level structure model of professional teaching evaluation, constructing the evaluation matrix, providing the judgment method, and then establishing the membership matrix, the development of the mathematical model of digital analysis of professional teaching evaluation is completed, and then a new method is provided for the continuous improvement of teaching evaluation under the construction of “first-class major”. The practice shows that the multi-level fuzzy evaluation model can effectively realize the quantitative expression of the qualitative indicators of teaching evaluation, and provide practical reference for the new evaluation strategy model in the construction of first-class majors in the period of digital transformation.