Abstract: This paper studies whether the teaching reform policy of process evaluation can effectively improve the teaching effect of specialized courses in colleges and universities with diversified and mixed teaching models. A multi period mixed cross-section DID model based on the teaching data of investment science of an economic management major in a university from 2013 to 2021 was constructed for demonstration, and the results showed that the implementation of process evaluation can indeed significantly improve the teaching effect of the course,which means that appropriate teaching evaluation reform is very necessary for improving the teaching effect of professional courses in colleges and universities. Therefore, it is necessary to further improve the teaching effect evaluation system of professional courses in colleges and universities, introduce objective and fair evaluation means aimed at improving students' learning efficiency, and build a dynamic process evaluation and supervision mechanism.

Key words: Process evaluation, Teaching effect, The science of investment, Double difference model, Professional curriculum, Diversified and mixed teaching mode