Abstract: Undergraduate thesis is one of the important components of undergraduate education and its quality directly reflects the quality of university education and university running level. Combining with the teaching status in local college, from the perspective of the mentor, we introduce the practical exploration and suggestions on quality improvement of undergraduate thesis and scientific research ability improvement of undergraduate： the 野 two-way choice冶 manner between mentor and undergraduate before thesis title selection is favorable to the implementation of undergraduate thesis; the title of the thesis should be closely related to the research field of the mentor, and the task should be designed with consideration of the undergraduates 忆 career planning after graduation; the determination and adjustment of thesis title should be made based on the undergraduates ability in literature reading and skill learning, and the notice associated with proposal should be released in a proper time; the experimental project should be adjusted according to the pre-experiment results and subsequently the formal proposal should be carried out. The sufficient time and guidance should be rendered to the undergraduates during the whole implementation process of thesis.