Objective To explore the influencing factors and classification characteristics of academic integrity intentions among graduate students in medical colleges based on the theory of planned behavior(TPB). Methods The Delphi method was used to develop scales for core variables. A survey was conducted on 735 graduate students from three medical colleges in Shanxi Province. Logistic regression analysis was applied to identify the risk factors of academic integrity intentions among graduate students, and latent category analysis was used to classify the categories of academic integrity intentions among graduate students. Results The proportion of graduate students with positive academic integrity intentions is 81.90%, which can be divided into four categories: comprehensive good type, cognitive and normative good type, self-control good type, and high-risk type. Behavioral attitude (OR=3.475, 95%CI: 2.128－5.677), perceived behavioral control (OR=3.115, 95%CI: 1.860－5.217), and subjective norms (OR=2.368, 95%CI: 1.329－4.220) are important influencing factors of academic integrity intention among graduate students. Conclusion Graduate students should become the first responsible person for their academic integrity. Academic standardization education and implement classified guidance should be strengthen in universities.