1. Theoretical research: A theoretical research paper is a display mode of innovative theories led by the author's thoughts on the basis of the author's reflection and research on the existing theoretical basis. This type is mostly used in liberal arts and science.

2. Applied research: The type of applied research is to put forward operable countermeasures and methods in view of the problems existing in objective phenomena. Engineering graduation thesis is often written in combination with a specific design, equipment, procedures, etc. , and mostly used for research, also known as graduation project.

3. Empirical type: empirical type is to form a new theoretical structure by investigating a certain problem or phenomenon and analyzing its data theoretically, 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 mostly used in medical papers.