The first type: theoretical research papers are based on the author's reflection on the existing theoretical basis and innovative theoretical demonstration mode, which is mainly used by arts and sciences.

The second type: applied research aims at the problems existing in objective phenomena and puts forward operable countermeasures and methods. Engineering graduation thesis is often written in combination with some specific design, equipment and procedures. , and mostly used for research, also known as graduation project.

The third type: empirical type is to form a new theoretical structure through the investigation of a certain problem or phenomenon and the theoretical analysis of its data, or through some successful or failed experiences and lessons, to prove the existence of a certain model in objective reality or the feasibility of its application and popularization. This type is the majority of medical papers.

According to the content and nature of the paper itself, there are different classification methods for the types of papers. According to the different contents and research methods, the paper is divided into theoretical papers, experimental papers, descriptive papers and design papers. Comprehensive classification, that is, the thesis is divided into four categories: thematic, argumentative, comprehensive and comprehensive.