[Objectives] Reintroduction programs have emerged as an important tool for saving and restoring rare and endangered species. Studies on individual survival and reproductive success after release can better optimize release strategies and guide post-release management in different release sites. [Methods] Analysis of variance (ANOVA) was used to test the average age of individuals first released in different release sites of reintroduced Crested Ibis (Nipponia nippon) in Shaanxi Province, and to compare the survival rate and reproductive success after release combined with the monitoring data after release. Generalized linear mixed model was used to analyze the effects of age, gender, individual source and duration of rewilding training on post-release survival probability at 6 months after release. [Results] The average age of first released individuals in the three release sites was significantly different (F = 40.35, df = 2, P < 0.001). The average age of first released individuals in Ningshan was the largest, which was 6.1 ± 1.9 years old (Table 1). Post-release survival probability of individual in Tongchuan was the highest (65.6%), and post-release survival probability of individual in Qianyang was the second (61.5%). There were significant differences in reproductive success in the first 3 years after release in different release sites (ANOVA, df = 2, P < 0.05), and the highest reproductive success was 57.7% ± 34.3% (n = 14, two, six and six nests were bred in 2014, 2015 and 2016, respectively) in Tongchuan, followed by 52.3% ± 43.3% (n = 14) in Ningshan (Table 3). Individual age was significantly negatively correlated with post-release survival probability (β =﹣0.21, 95% confidence interval, CI: ﹣0.45 to﹣0.04, P < 0.05, Table 2). However, gender, individual source and duration of rewilding training had no significant effect on survival rate after release. [Conclusions] Based on the differences in survival and reproductive success among the three release sites, we suggest that the release group can be selected according to the age structure of the source population and the genetic composition of the individuals in the specific environment of the release sites. Individuals from different source population can be mixed in captivity at the release site, and then released after appropriate rewilding training. Furthermore, the results showed that autumn may be the best release time of crested ibis.