In the development and application of modern medical devices, the performance of coatings plays a vital role. Coatings not only protect medical devices from corrosion, friction and biological adhesion, but also enhance the biocompatibility of devices and reduce immune responses. However, the effectiveness of coatings depends largely on their surface properties, especially contact angle performance. Contact angle measurement is a key surface analysis technique used to evaluate the wettability of material surfaces, which in turn affects the actual effect and durability of coatings. Therefore, contact angle performance testing of medical device coatings has become an important step that cannot be ignored.