Purposes of the study: The study reviews and explores the Taiwanese and Mainland Chinese amateur boxing players' cognition of sport injuries at different parts of their bodies, their knowledge of injuries and protection, their self-care and self-protection abilities, the current situation of their opinions on taking off helmets and protective gears, and comparison of the differences. The study intends to make boxing players review their cognition of their sport injuries and their self-protection abilities. The research results can be a reference for the relevant authority to face the problem of sport injuries squarely. It is hoped that they can endeavor together to achieve the goals of decrease of sport injury cases and correct handling of sport injuries. Methods: The study takes the 18- to 26-year-old social-group boxing contestants of both China Open Boxing Tournament of Mainland China Sports Lottery Cup 2013 and Taiwan National Sports Game 2013 as the main research targets. Results: For cognition of the parts of bodies having sport injuries and the seriousness of injury, contestants mostly got blisters on feet, contusion and muscle strain during practice, but mostly got head wounds during boxing games. Contestants of different countries do not have significant difference in the seriousness of sport injuries, but contestants of different genders, boxing ages and weight levels have significant difference in cognition of the parts of bodies having sport injuries and the seriousness of injury. And Taiwanese contestants have higher extent of cognition than Mainland Chinese contestants of the parts of bodies having sport injuries of fracture, chronic myotenositis and backbone injury. Suggestions: (1) Athletes themselves should strengthen their related knowledge of sport injuries and their self-care and self-protection abilities. (2) To contestants with less boxing experience and of lighter weight levels, education of sport injury prevention as well as self-care and self-protection have to be strengthened. (3) As to handling of sport injuries for Taiwanese contestants, a correct concept of seeking for medical attention not only should be instilled in them, the functions of sport injury control experts and health managers should also be strengthened. (4) The follow-up development after amateur boxing players take off their helmets and protective gears in games should be under close attention continuously.