Plant Growth-Promoting Bacteria (PGPR) are a group of bacteria beneficial to crops, among which Phosphate-Solubilizing Bacteria (PSB) are of interest due to their ability to support plant resistance to salt stress and produce plant growth-promoting substances. This study aims to investigate the synthesis capability of the plant growth promoting substance indole acetic acid (IAA) by the salt-tolerant phosphate-solubilizing Pantoea sp. TTB4.1 strain and its effect on the germination ability of corn seeds immersed in bacterial suspension. The research findings indicate that over a 10-day cultivation period, the Pantoea sp. TTB4.1 strain was able to synthesize IAA in quantities ranging from 1.163 to 3.916 μg/mL, with the highest IAA content observed on day 4. Concurrently, this study also evaluates the impact of the salt-tolerant phosphate-solubilizing Pantoea sp. TTB4.1 strain on the germination ability of corn seeds through experiments involving immersion in bacterial suspension for 30, 60, 90 minutes. The results showed that root length, shoot length, number of roots, and germination rate of the corn seeds were all higher compared to the control experiment (without bacterial immersion).