Perseverance is a personality state in the face of setbacks. Undergraduates with high perseverance have higher confidence in their success, recover from negative emotions quickly, and are more likely to engage in persistent behavior although faced with setbacks. In contrast, undergraduates with low perseverance are not confident that they will succeed, are immersed in negative emotions, and give up easily when they experience setbacks. Improving confidence in success, emotional experience and persistent behavior of undergraduates with low perseverance can help them overcome setbacks and achieve success. Thus, the current study aimed to explore how to improve the setback psychology of undergraduates with low perseverance. Winner effect is defined as increased probabilities of winning future contests as a result of past experience of winning. Previous studies showed that confidence in success, positive emotions, and persistent behavior were significantly improved after experiencing successes. It suggests that successful experiences can improve the setback psychology of undergraduates with low perseverance after encountering setbacks. The present study aimed to further investigate how many times undergraduates with low perseverance experience successes can improve their setback psychology. In study 1, the undergraduate perseverance scale was used to select high-, middle- and low-perseverance groups. A figure reasoning task was used to create the setback-consecutive success situation. Participants experienced a setback and then experienced 1 success and 2, 3, 4, 5, 6, 7, 8 consecutive successes. The results found that the confidence in success of undergraduates after encountering setbacks improved after experiencing 1 success and began to level off after experiencing 6 consecutive successes. After encountering setbacks, the positive emotions of high perseverance group improved and began to level off after experiencing 1 success, and those of middle perseverance group improved after experiencing 1 success and began to level off after experiencing 4 consecutive successes, and those of low perseverance group improved after experiencing 1 success and began to level off after experiencing 6 consecutive successes. After encountering setbacks, the persistent intentions of high perseverance group improved and began to level off after experiencing 1 success, and those of middle perseverance group improved after experiencing 1 success and began to level off after experiencing 6 consecutive successes, and those of low perseverance group improved after experiencing 1 success and began to level off after experiencing 7 consecutive successes. In study 2, the undergraduate perseverance scale was used to select high- and low-perseverance groups. An anagram task was used to create the setback-consecutive success situation. Participants experienced a setback and then experienced 1 success and 2, 3, 4, 5, 6, 7, 8 consecutive successes. The results found that the confidence in success of undergraduates after encountering setbacks improved after experiencing 1 success and began to level off after experiencing 7 consecutive successes. After encountering setbacks, the positive emotions of high perseverance group improved and began to level off after experiencing 1 success, and those of low perseverance group improved after experiencing 1 success and began to level off after experiencing 6 consecutive successes. After encountering setbacks, the persistent intentions of high perseverance group improved and began to level off after experiencing 1 success, and those of low perseverance group improved after experiencing 1 success and began to level off after experiencing 7 consecutive successes. In conclusion, successful experiences can improve setback psychology of undergraduates with low perseverance. The positive emotions of undergraduates with low perseverance can be improved quicker than the persistent behavior after experiencing setbacks.