Purpose: This study intended to determine how suspension exercise training (SET) improves physical performance in Taekwondo athletes. Methods: Research participants were 26 male Taekwondo athletes who competed in level A collegiate competitions. After one semester of baseline tests, all participants received similar tests before and after 6 weeks of TRX suspension training. During the SET period, in addition to 4 regular training sessions in Taekwondo, the participants also completed three SET sessions every week. There were 4 types of exercises (squat jump, oblique crunch, hamstring curl, and lunge) in the SET training. Each type of exercises was performed for 30 seconds with 30 seconds rest between different types of exercises. A total of 3 sets of exercises was performed in one session. A one-way ANOVA with repeated measures followed by a Fisher’s least significant difference comparison was used to examine the differences of all variables among the three tests (baseline, pre-training, and post-training). The significance level was set at p<0.05. Results: Six weeks of SET significantly improved physical fitness in these participants by decreasing body fat (about 14%) and increasing standing long jump distance. Their physical performance in balance, sprint, vertical jump, agility, and peak anaerobic power were also improved. Conclusion: Taekwondo athletes would benefit from 6 weeks of SET for improving their physical fitness and physical performance.