Objective To assess the effects of three consecutive days of beetroot juice （BRJ） consumption on the explosive power， repeated sprint ability， and cognitive performance of soccer players with fatigue.Methods A total of 24 male university soccer players were recruited for this randomized， double-blind， placebo-controlled experiment. They were divided into three groups： control， low-dose （300 mL/d with 0.53% NO₃^-）， and high-dose （300 mL/d with 4% NO₃^-） BRJ supplementation. Baseline measurements including countermovement jumps （CMJ）， Yo-Yo intermittent recovery （YY1R）， and Stroop color-word tests were recorded. The participants consumed BRJ or a placebo for 3 d while maintaining their normal training and lifestyle routines. The final measurements were recorded 2 h after the last BRJ supplementation.Results Following short-term BRJ supplementation， individuals in both the low- and high-dose groups achieved significantly higher running distances than those in the control group （P<0.05）. Moreover， individuals in the high-dose group achieved a significantly greater running distance than those in the low-dose group （P<0.05）. There were no significant differences in ratings of perceived exertion （RPE） among the groups during the first 12 sprints （P>0.05）. However， during sprints 13-20， individuals in the control group achieved significantly higher RPE values than those in the low- and high-dose groups （P<0.05）. In terms of CMJ， compared to individuals in the control group， those in the low- and high-dose groups showed significant improvements in jump height and power （P<0.05）， with those in the high-dose group showing greater improvements than those in the low-dose group （P<0.05）. In the Stroop color-word test， compared to individuals in the control group， those in the low- and high-dose groups exhibited significant improvements in accuracy and reduced reaction times （P<0.05）.Conclusion We demonstrated that short-term BRJ supplementation significantly enhanced explosive power and repeated sprint ability in soccer players. It also alleviated the discomfort associated with repeated sprints and mitigated the decline in cognitive performance following high-intensity exercise.