College students are between 18-23 years old. The psychological development stage of college students is from adolescence to early adulthood. At this stage, the main psychological conflicts are intimacy and loneliness, which show that college students establish intimate love relationships in love and friendship with others, so as to experience intimacy, otherwise they will feel lonely. The psychological characteristics of college students mainly include the following aspects: 1. Seriously, the application of college students' intellectual development in social situations is in the stage of achievement. The characteristic of this stage is that they no longer study just for curiosity, but use what they have learned to achieve a certain purpose, such as career and family. 2. think. Abstract logical thinking of college students is at the peak of their lives, dialectical logical thinking tends to be mature and perfect, creative thinking is still being further improved, and thinking is more independent and judgmental. 3. Self-identity. Self-identity refers to self-confirmation, thinking and choice of some important issues related to self-development in the process of seeking self-development. At the same time, it is also a subjective feeling and experience of self-consistency and continuity in the past, present and future, and it is an individual's self-integration in a specific environment.