First of all, the main points involved in the self-taught undergraduate thesis defense mainly include the following aspects. The first is to evaluate the rationality and importance of the topic. The topic selection of the thesis must have certain theoretical and practical significance and can solve practical problems to some extent. The second is the overall structure and logic of the research content. The paper should have a clear chapter structure and good logical connection between chapters, so that the whole paper has high academic value. The third is a comprehensive analysis and summary of relevant literature. When defending, students need to make a comprehensive analysis and summary of their research work to prove their understanding and mastery of this field. The fourth is to evaluate the rationality of research methods and data processing. Students need to clearly explain the rationality of their chosen research methods and data processing methods, and make corresponding arguments. Finally, the accuracy and objectivity of the research results and conclusions are evaluated. When defending, students need to accurately describe their research results and conclusions, and can give reasonable answers according to on-site questions.

In addition, the self-taught undergraduate thesis defense also needs to pay attention to the following key issues. The first is clarity of thinking and expression. In the process of defense, students need to express their research ideas and key points in concise and clear language, so that judges and listeners can understand them accurately. The second is the mastery of professional terms and professional knowledge in the paper. Students need to have enough professional knowledge and technical terms to correctly explain and use them. The third is the elaboration of academic viewpoints and innovative discoveries. Students need to have a solid academic foundation and innovative consciousness, and be able to accurately and innovatively explain their research results.

To sum up, self-taught undergraduate thesis defense is a comprehensive evaluation of self-taught undergraduate students' academic performance. It mainly includes the rationality and importance of the topic selection, the overall structure and logic of the research content, the analysis and review of relevant literature, the rationality of research methods and data processing, and the accuracy and objectivity of research results and conclusions. In addition, the defense also needs to pay attention to the clarity of thinking and expression, the mastery of professional terms and knowledge, and the elaboration of academic views and innovative discoveries. Through defense, students can not only show their research results, but also improve their academic level and expression ability. Finally, the paper also needs to carry out repeated testing.