Trinity education mode is an important assessment standard in the process of college teacher team construction. Through in-depth exploration of Trinity education mode, data can be further updated in real time from many aspects such as students' training needs, personal development direction and teaching resources reorganization, which is conducive to the basis of college teacher team construction process and can also combine the current situation and core advantages of college teacher team development. It can also integrate the advantages of quality education and trinity education, and further provide new directions for the development of university teachers. Therefore, under the background of new era development, it is an effective way to improve the effectiveness of college teachers' team construction through Trinity education mode, and further realize the advantages of team construction and innovative development in the traditional team construction.

Political identity is of special significance to the political construction and social development of contemporary China. Returnee lecturers are an important part of the university teaching team and an important force in training socialist builders with Chinese characteristics. An empirical survey was conducted on 35 returnee lecturers in universities in Jinhua area by means of questionnaires and interviews. The results show that the political identity of the returnee lecturers is generally good, but there are some problems, such as political party identity, national identity, institutional identity and interest identity need to be improved. As a result, factors such as gender, political profile and length of stay abroad have a significant effect on the political identity of returnee lecturers. The paper concludes with some initiatives, such as strengthening ideological and political education, improving remuneration and promoting career development.