Improving the loyalty of competitors is an important factor to promote the development of sports events. Based on the theory of social exchange, this paper uses literature, questionnaires and mathematical statistics to investigate the loyalty of competitors in the 2021 Zigui China Dragon Boat Competition. The results show that: there is a positive correlation between two of the four variables, and after regression analysis, it is concluded that the perception of soft service level and the perception of hardware service level have a significant positive impact on player satisfaction; hardware service level perception and participation Player satisfaction has a significant positive impact on participant loyalty, while software service level perception has no obvious negative impact on participant satisfaction; it can be seen that the competition party must promote the optimization of competition service level, improve participant satisfaction, and thus promote participants Loyalty increase.