Hanging many courses during college will have the following effects: 1. Extend graduation time: Failing the course will lead to insufficient credits, which may extend graduation time. 2. Affect the style of study: failing the course may affect students' sense of responsibility and self-confidence, thus affecting the style of study. 3. Affect literacy: Failing the course will affect course learning and knowledge reserve, which may further affect students' literacy. 4. Restrict future development: Failure in the course may have an impact on future study, postgraduate entrance examination and employment. , and may cause restrictions. 5. Increase the financial burden: Because the failed courses need to be re-taken or re-selected, it may increase the financial burden of students. So hanging up many courses will not only affect students' academic development, but also affect students in many ways.