［Objective/Significance］ The resins widely used in coatings are derived from petroleum-based materials. With the depletion of fossil resources and the need for environmental protection，developing bio-based resins that do not rely on fossil resources is of great significance forthe green development of coatings.［Analysis/Discussion/Progress］This paper reviews the research progress of bio-based resins，focusing on the new resins prepared using bio-based materials such as vegetable oils，cardanol，and lignin. It also summarizes the modification methods of these bio-basedresins. The performance of the coatings obtained from some modified bio-based resins is comparable to， or even better than，that of the coatings obtained from petroleum-based resins.［Conclusion/Prospect］ Currently，some bio-based resins still face challenges such as complex preparation processes andrelatively high costs. In the future，by reducing costs and optimizing performance，bio-based resins will play a greater role in the coatings field.