Abstract: Nowadays, sports have been widely integrated into people's social life and economic activities, during which the trademark plays an important role.Trademarks in the sports field have characteristics of various forms, centralized owners and specific products purchasers, and its legal protection also has justification.The application of infringement identification rules in the sports field has special features, while fair use, freedom of speech, non-use in consecutive three years and anti-trust constitute main infringement defenses.