To improve the quality of undergraduate graduation theses in application-oriented universities， this study took 278 undergraduate graduation theses of agronomy majors of X University from 2019 to 2022 as samples，and analyzed their topic selection，thesis grades，and the relationship between thesis supervisors and thesis quality. The results revealed that the overall quality of undergraduate graduation theses in application-oriented universities was relatively good but showed a declining trend. Additionally，the quality of theses was found to be relevant to the supervisors. Based on the identified issues in thesis quality and the actual situation of application-oriented universities，this paper proposed several suggestions from the three different dimensions of schools，teachers and students，in order to provide reference for the study on the quality of undergraduate graduation theses in application-oriented universities.