PurposeAthlete burnout is an adverse factor that usually decreases athletes' sports performance and reduces their passion for athletic career development. The present study examined the association of coach-athlete relationship, training satisfaction, and athlete burnout, and then explored the training satisfaction as a mediating role of the effect of coach-athlete relationship on athlete burnout among college soccer players.MethodsSoccer players from seven Chinese higher education institutions were recruited for the study. The participants were selected using stratified random sampling and included 218 participants. The Coach-Athlete Relationship Scale, Training Satisfaction Scale, and Athlete Burnout Questionnaire were used to collect data from the participants. Pearson's product-moment correlation analysis, linear regression analysis, and bootstrap method were conducted to analyze the collected data set.ResultsThe results showed that (1) there was a significant correlation between coach-athlete relationship, training satisfaction, and athlete burnout. (2) coach-athlete relationship and training satisfaction significantly negatively predicted athlete burnout (β = −0.39, p < 0.001; β = - 0.29, p < 0.001). (3) training satisfaction had a significantly mediating effect on the relationship between coach-athlete relationship and athlete burnout (β = −0.15, p < 0.001, ES = 0.28).ConclusionCoach-athlete relationship can not only directly negative impact athlete burnout but can also negatively influence athlete burnout through the mediating effect of training satisfaction. Therefore, we suggest the following to alleviate athlete burnout: on one hand, coaches can provide more communication opportunities for athletes to improve the coach-athlete relationship. On the other hand, teams can enhance training satisfaction by building team culture.